Some quotations I have found interesting or amusing:

Light:

"Just because something doesn't do what you planned it to do doesn't mean it's useless." -Thomas Edison

"Experience is what you get when you don't get what you want." -Anonymous

"If you will find yourself in a hole, the first thing to do is stop digging." -Will Rogers


Anger, power, paradox, contradiction:

"When a man is wrong and won't admit it, he always gets angry." -Haliburton

"There was never an angry man that thought his anger unjust." -St. Francis De Sales

"We thought, because we had power, we had wisdom." -Stephen Vincent Benet "Litany for Dictatorship"

"People are never so near playing the fool as when they think themselves wise." -Lady Montagu

"When all is summed up, a man never speaks of himself without loss; his accusations of himself are always believed, his praises never." -Montaigne

"What a pity that human beings can't exchange problems. Everyone knows exactly how to solve the other fellow's." -Olin Miller


"Most people would succeed in the small things if they were not troubled with the great ambitions." -Longfellow


"The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man." -George Bernard Shaw


"Almost every wise saying has an opposite one, no less wise, to balance it." -George Santayana