Using a knife or sharpening one looks pretty simple and straightforward business. Even when I explain and show someone what happens to a particular edge, why for how it will be used a particular solution would work better (edges for knives are in many situations as personal as edges for razors), how geometry works, why going higher grit helps even stainless steel knives, what happens when you cut, how to cut, on what and other stuff, it's a bit difficult to accept. Many find it difficult to even answer my simple questions. I've been doing this for a long time now. There is some good news. Every single one was able to feel immediately a knife that cuts well. And I guess this is a win. I've been asked so many times about what I've done to the knife that it cuts like never before. There would be a lot to talk about. I've been writing a big reply on this, but I've realized it was way too big (took me 2 days) and then after cutting it, I didn't like it anymore, just to end up deleting it entirely.

There is a much bigger picture here. It's a lot more about choices in general. Not related to knives or razors at all.

Razors and knives are the same in more ways than they ever could be different. Even if knives will let you get away a lot easier with pretty much anything, while razors are stubborn like that and will not. Since knives are more forgiving, people will use that to justify a lot of things. Then again, if you start adding all the things above and do them right, you feel even a more of a difference than just a sharper edge. It's quite nice to take a knife and glide with it. I've just modified a Zwilling. It took me a couple of days on stones. Full flat on one side, unchanged on the other, but now with a little long convex edge on the outside. The difference is so big, that it cuts on its own. I hardly do anything. It will guillotine through foods like crazy. Prior to this, not only I could really feel the cutting, I was doing the cutting even if the edge itself would shave in the first place.

I've read a lot of good points already. You guys are very lucky and know even more than you might realize. I've started with razors after. And the more I worked with them, the more I realized how many principles I was using on knives.