The most important thing about a problem is not it's solution but the strength we gain in finding the solution.
It ain't what you don't know that gets you into trouble. It's what you know for sure that just ain't so.
Criticism may not be agreeable, but it is necessary. It fulfills the same function as pain in the human body. It calls attention to an unhealthy state of things.
Do not noun people. Verb them. (You are not a liar. You lied. You are not a bad person. You did a bad thing.)
Everything that you are waiting for to pass will pass too soon.