The key to learning is feedback. It is nearly impossible to learn anything without it.
Don't trust, just verify.
Purity is a good mask for corruption because it discourages inquiry.
When people don’t pay the true cost of something, they tend to consume it inefficiently.
No matter how expert you may be, well-designed checklists can improve outcomes.
As W.C. Fields once said: a thing worth having is a thing worth cheating for.