What a man can be, he must be. This need we call self-actualization.
The motor of our ingenuity is the question ‘Does it have to be like this?’, from which arise political reforms, scientific developments, improved relationships, better books.
The secret of reaping the greatest fruitfulness and the greatest enjoyment from life is to live dangerously.
Tolerance is the quality of truly powerful individuals.
Life is what happens when you're busy making other plans.