Humility will open more doors than arrogance ever will.
Failure is an event, never a person; an attitude, not an outcome.
Optimists are those who go after Moby dick in a row boat with a bucket of tarter sauce.
Remember that every man at times stumbles and must be helped up: if he's down, you cannot carry him. The only way in which any man can be helped permanently is to help himself. —Theodore Roosevelt.
Encouragement and hope are the two most powerful qualities any person can provide to others.