Man is the only animal for whom his own existence is a problem which he has to solve.

Immature love says: 'I love you because I need you.' Mature love says 'I need you because I love you.'

Greed is a bottomless pit which exhausts the person in an endless effort to satisfy the need without ever reaching satisfaction.

It takes a moment to tell someone you love them, but it takes a lifetime to prove it.

Love isn't something natural. Rather it requires discipline, concentration, patience, faith, and the overcoming of narcissism. It isn't a feeling, it is a practice.

Creativity requires the courage to let go of certainties.

Man's main task in life is to give birth to himself, to become what he potentially is. The most important product of his effort is his own personality.

The lust for power is not rooted in strength but in weakness.

The task we must set for ourselves is not to feel secure, but to be able to tolerate insecurity.

The scars left from the child's defeat in the fight against irrational authority are to be found at the bottom of every neurosis.

To love somebody is not just a strong feeling - it is a decision, it is a judgment, it is a promise.

People believe what they are told.

By the 1960s the United States had a new ruling class—the teenager!

I have seen life from the top down and the bottom up. I know how it looks both ways. And I know there is wisdom and that there is hope.

I'm definitely the super-cool dad.

Just be glad you don't live in one of those little countries where at this very moment, music is severely restricted, or as it is in Iran, totally illegal.

Try not to become disappointed if someone doesn't like a story you've written. Stick up for your ideas, but listen to what other people say, too. They might have good advice.

For me, [John Wheeler] was the last Titan, the only physics superhero still standing.

President Obama wants to put free enterprise on trial.

I was raised in Mississippi, so heat and humidity is my bread and butter. It keeps me going. I can't stand cold weather.

I sometimes like the pictures photographers take of me.