Lisp is worth learning for the profound enlightenment experience you will have when you finally get it; that experience will make you a better programmer for the rest of your days, even if you never actually use Lisp itself a lot.

You can't be afraid of people willing to hurt you, because if you fear life, then you will never live.

Never stop asking questions, because that's where discovery begins.

The stone industry needs to embrace technology while preserving tradition.

When you fail, that's when you get up and try again. There's no reason to just stay down.