Forgive me, readers, for I have sinned. My last blog entry was three days ago.

On September 22, my dad the angry atheist prayed for salvation, and later, I reported that there was an unexpected benefit to this startling event: the two of us got along better. I was less driven to avoid him. His frustrating mistakes and deliberate bad behavior tapered off, and when they occurred, they bothered me much less than they used to. I found I needed less solitary time for recharging.

I am here to report that things haven’t gone back to the way they used to be. My dad and I are spending more time together, and life is going pretty smoothly.

I suppose it makes sense that a child of God would look for opportunities to get away from a child of darkness and regroup. Spending time with God is beneficial. When he’s with you, he helps you. He tells you things. He drives away spirits that make you suffer. He may work miracles in your body. It’s only natural that spending time with beings from the other side would wear you down.

Something new is going on. These days, God’s presence comes to me in the afternoon and brings peace. The house starts to feel like a church. I have been in God’s presence every day for a number of years, but he hasn’t always brought peace with him. In the past, it was mainly power.

For years, I’ve been praying for God to make my house a place of peace, where people live in his presence. I hope what I’m seeing is the answer to those prayers.

The children of darkness don’t have peace. They may have money, looks, fame, admiration, and so forth, but it’s hollow because they don’t have the peace God brings. Many of them have to fight constantly to keep what they have. Many have to pay huge prices in order to get the outward appearance of success.

I now believe that if you don’t have peace, you must be under the influence of spirits that are against God. A lack of peace indicates that you have a spiritual issue that needs to be addressed.

God will allow us to have problems. He will allow us to be persecuted. Nonetheless, we’re supposed to have peace. If you feel rushed, worried, or pressured, a supernatural force is trying to control you. God doesn’t use things like anxiety and fear to motivate people who are cooperating with him.

When I think of the worst people I’ve known, I realize they tried to control me by taking away my peace. They tried to scare me. They pressured me. They laid false guilt trips on me. They tempted me to do things I knew I shouldn’t do. Rotten people make you feel rotten. They may not make you feel bad at first, but it will creep up eventually. Dependence on a toxic person is like dependence on drugs or alcohol. The first time you get drunk or high, it feels fantastic. The thousandth time, it’s unrewarding.

The reason it’s so easy for me to cut people out of my life is that I hate being manipulated more than I hate losing people.

Toxic people and toxic spirits are alike, because spirits run people. Spirits that are out to get you may make you feel blessed at first, but once they have control, they make you suffer for their pleasure.

I want God’s presence. I want his peace. I don’t want to worry any more. I don’t want to feel pressured.

If you’re in a close relationship with someone who isn’t on board with Jesus and the Holy Spirit, you need to cut the cord before the ties get too strong. You know better. You can’t say you weren’t warned, and God often closes his ears to people who deliberately do stupid things.

In other news, I’m still fooling around with tools. I think it’s time to move my machine tools here. I’ve decided where to put them. I have to get an electrician to give me an estimate on some 60-amp sockets.

I decided to get some CBN wheels for my bench grinder. CBN is cubic boron nitride. It’s extremely hard. Only diamond is harder.

When I started using machine tools, I learned I needed special grinding wheels in order to shape cutting tools for the lathe. Lathe tools are made from sticks of high speed steel (“HSS”) which is an amazing type of hardened steel that doesn’t soften when it gets red hot. When you shape lathe tools, you can use the cheap grey wheels that come with grinders, but they don’t work very well.

The best moderately priced choice is white bonded aluminum oxide. This is a substance made from crumbs of aluminum oxide held together with resin. A white wheel will shed particles as you grind, and that exposes new sharp edges to keep the wheel cutting well.

I probably spent $200 on a pair of white wheels, and they work fine on HSS. Problem: when you’re a woodworker as well as a machinist, you use tools that are made from tool steel. Tool steel loses its temper when it gets hot. I don’t mean it gets angry. It gets soft. White aluminum oxide wheels will work on tool steel (plane irons, chisels, and so on), but they will heat the metal fast, so you’re likely to burn your tools.

Another problem with aluminum oxide: because the wheels are friable, they change shape as you grind. You have to buy tools that reshape them. The best tool is a stick of carborundum. Diamond tools work faster, but they smooth the wheels too much, reducing their cutting ability. A smooth wheel generates more heat.

Here’s yet another problem: aluminum oxide is ceramic, and all ceramic wheels explode. Bench grinders are extremely dangerous. The wheels can develop cracks (grinding brass or aluminum can make them crack), and then they shatter. Flying fragments can penetrate your skull or your genitals. It’s bad.

Want more bad news? You can’t grind things on the side of a ceramic wheel. I know; I know. You’ve been doing it for years, and you’re still alive. You’re lucky. One day you’re going to get hurt. Pushing on the side of a ceramic wheel will eventually crack it.

Aluminum oxide wheels are problematic, so what’s the answer? Diamond wheels! That must be it. Diamond is super hard, and diamond wheels are made of metal with diamond particles stuck to them, so they can’t blow up.

Sadly, this is wrong. Diamonds are carbon, and carbon dissolves in iron, nickel, and cobalt. That’s why steel is possible. It’s iron with carbon dissolved in it. If you get diamonds hot while you grind a steel tool, they will start to dissolve into the tool. That’s bad for the wheel. Probably doesn’t do the tool a world of good, either.

CBN is very, very hard. When you can’t have a diamond, CBN is a good second choice.

Like diamond wheels, CBN wheels are metal disks with abrasive particles stuck to them. They don’t wear down like aluminum oxide. You never have to dress them to restore their shapes. Because CBN is very hard, it lasts for decades. Because CBN wheels are mainly metal, they conduct heat well. Grinding with CBN wheels generates heat, but they also carry heat away, so it’s hard to hurt a tool steel blade by burning it.

It’s pretty cool.

The only drawback to CBN is this: you can’t use them on soft steel. If a steel object isn’t hardened, the steel will clog the CBN wheel, and then you have a problem.

I’ve been fooling with planes and chisels lately. I have a Stanley 60-1/2 block plane I ordered, and I also have a flat-bottomed Millers Falls #14 plane. Both irons needed reshaping. I got myself an XX-coarse DMT diamond stone, but it’s very slow. I know I said you shouldn’t use diamond wheels with steel, but flat diamond stones are okay. They don’t get hot enough to make the diamonds dissolve.

I have a couple of other ways to fix the irons. I have a belt grinder and a bench grinder. The belt grinder is hard to use accurately with edged tools. The bench grinder isn’t much easier. On top of all that, they both burn tools.

I would like to accumulate more edged tools, but I don’t want to spend the rest of my life using slow abrasive methods to work on them. CBN looks like the answer to my prayers.

I ordered a pair of wheels. One is 180 grit, and it has a flat face and two flat sides. Because it’s not ceramic, it’s okay to grind on the sides of it. That will be very useful.

Ordinarily, you would use something like 80 grit for a coarse wheel, but CBN cuts much faster than aluminum oxide, so you can use a finer grit and get a better finish. BONUS!

The other wheel is 600 grit, and it has radiused edges. It’s crazy. You can use the flat face to sharpen things, and you can do pretty weird stuff with the rounded edges and the sides.

Because a metal wheel can’t blow up, you can take the guards off a bench grinder with CBN wheels. You still have to be concerned about getting caught in it, so you have to apply the relevant safety rules, but it’s not going to kill you.

I’m looking forward to using these wheels. I am not going to mess with any chisels or planes until the wheels get here.

The wheels cost a fortune, but only about 1.8 times what ceramic wheels cost. They will never wear out or explode, and I will never have to dress them. They’ll save me a ton of time, and they’ll do a better job. They’ll do things the ceramic wheels can’t do, period. It’s worth it.

I don’t think it’s an exaggeration to say that white wheels are obsolete for my purposes. Their only real virtue is price, and it’s an illusion when you consider the fact that ceramic wheels eventually have to be replaced.

What will I do when I want to grind unhardened steel? Simple. Belt grinder.

I’m planning to start using the bench grinder to shape all of my blades. A wheel makes an arc in a tool, so the profile is sort of hollow. It’s called a hollow grind. This gives you a bevel that doesn’t contact a flat stone along its entire length. The heel will touch the stone, and so will the edge, but the part between the heel and edge will not.

When you start a bevel on a grinder and then move to a flat stone, you end up cutting less metal on the stone. Only a small percentage of the bevel touches the stone, and you only have to grind that percentage off. It makes the work go faster.

You can also get a hollow grind on a belt grinder. Belts go around wheels and pulleys, so you can hold your bevel against a rounded surface. You can also buy a platen which has a radiused surface, so it’s like a small segment of a big wheel.

I was thinking I might try to shape a blade on my oscillating belt sander. This is an easy-to-use woodworking tool that moves a sanding belt up and down while it runs on two vertical pulleys. It might work. It’s very controllable. I have this feeling people don’t understand how useful this tool can be. I’m still getting the CBN wheels, though.

The weather is getting very nice now, so working outside and in the shop will be more pleasant. I wish I could have done more last year, but it seemed like I was always reeling from some calamity or other.

I’m also spending time fooling with math and physics. I’ve been doing problems. Strength of materials. Differential equations. Quantum mechanics. Whatever seems interesting. Maybe I can get back some of what the years took away, and adding some mechanical engineering would be great.

My engineering studies started very well, but I ran into an integral that showed me how much I had forgotten. Building up integrals from scratch used to be second nature to me, but I’m having to go back and re-learn it. It ought to go pretty quickly, since I’m just renewing abilities I used to possess.

I bought a new copy of a book I used to have: Amit Goswami’s Quantum Mechanics. I bought it as an undergrad because I hated our assigned text: Gasiorowicz. I left it in storage in Miami, and ants ate it. Made me really mad. I don’t need it, but it always bothers me when I think of the books I lost, so sometimes I replace one just to make myself feel better.

That’s it for today. I plan to sit down and see if I can integrate. if not, well, I’m still reasonably young. I can always take up something less challenging, such as writing legal memoranda or fingerpainting.