Some of these may be familiar, others may not. I found these here: Inspirational One Liners. Feel free to click on the link if you want to see more.

"To conquer fear is the beginning of wisdom." - Bertrand Russell

"No-one can make you feel inferior without your consent." - Eleanor Roosevelt

"A mistake is only a mistake if you don't learn from it." - Origin Unknown

"There is none so blind as those who will not listen." - William Slater

"Do not walk behind me, I may not lead. Do not walk in front of me, I may not follow. Just walk beside me and be my friend." - Albert Camus

"Difficulty is not an obstacle, it is merely an attribute". - Wal Sakaluk

"It is amazing what you can accomplish if you do not care who gets the credit." - Harry S Truman

"A person who graduated yesterday and stops studying today is uneducated tomorrow." - Origin unknown