Every moment of one's existence one is growing into more or retreating into less.
You couldn't even prove the White House staff sane beyond a reasonable doubt.
There are admirable potentialities in every human being. Believe in your strength and your youth. Learn to repeat endlessly to yourself, 'It all depends on me.'
You can't just ask customers what they want and then try to give that to them. By the time you get it built, they'll want something new.
Any transition serious enough to alter your definition of self will require not just small adjustments in your way of living and thinking but a full-on metamorphosis.
All things are difficult before they are easy.
Self-importance is our greatest enemy. Think about it - what weakens us is feeling offended by the deeds and misdeeds of our fellowmen. Our self-importance requires that we spend most of our lives offended by someone.