Time to re-read Meditations. I don’t remember any of what I read 5 years ago. On one hand it makes me sad that I’ve forgotten so much wisdom but I’m happy I get to rediscover it now.
I discovered once that humans don't usually remember that which they do not understand. As your understanding grows, so will your memory of it. It may be necessary to re-experience a thing many times before you understand it well enough to remember it.