The strongest knowledge (that of the total freedom of the human will) is nonetheless the poorest in successes: for it always has the strongest opponent, human vanity.

That which does not kill us makes us stronger.

There is always madness in love. But there is also always some reason in madness.

Sometimes people don't want to hear the truth because they don't want their illusions destroyed.

There are two different types of people in the world, those who want to know, and those who want to believe.

I was in darkness, but I took three steps and found myself in paradise. The first step was a good thought, the second, a good word; and the third, a good deed.

There will always be rocks in the road ahead of us. They will be stumbling blocks or stepping stones; it all depends on how you use them.

You have your way. I have my way. As for the right way, the correct way, and the only way, it does not exist.

I'm not upset that you lied to me, I'm upset that from now on I can't believe you.

Enjoy life. This is not a dress rehearsal.

The true man wants two things: danger and play. For that reason he wants woman, as the most dangerous plaything.

When you commit a crime to upgrade yourself, your sin becomes a blessing, but your blessing kills you before your time.

If a problem is clearly stated, it has no further interest to the physicist.

The full-grown modern human being ... is conscious of touching the highest pinnacle of fulfillment... when he is consumed in the service of an idea in the conquest of the goal pursued.

Vade Mecum I want the scissors to be sharp and the table perfectly level when you cut me out of my life and paste me in that book you always carry.

Furthermore, America suffers not only from a lack of standards, but also not infrequently from a confusion or an inversion of standards.

Martin Luther King has taken away from the Negro his Gov-given right to defend himself.

Clothes do not make the man; friends and engagement with life do.

One key to entrepreneurial success is to get a great group of people around you who believe in your idea.

Our contest is not only whether we ourselves shall be free, but whether there shall be left to mankind an asylum on earth for civil and religious liberty.

I'm not interested in giving aid and comfort to the neo­-Conservatives.