Ours is an age of criticism, to which everything must be subjected.

Science is organized knowledge. Wisdom is organized life

It is beyond a doubt that all our knowledge begins with experience.

Rules for Happiness: something to do, someone to love, something to hope for.

We can judge the heart of a man by his treatment of animals.

Two things fill the mind with ever new and increasing admiration and awe, the oftener and more steadily we reflect on them: the starry heavens above me and the moral law within me.

Always recognize that human individuals are ends, and do not use them as means to your end.

Three things tell a man: his eyes, his friends and his favorite quotes

You only know me as you see me, not as I actually am

The greatest human quest is to know what one must do in order to become a human being.

All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.

There is no pride when it comes to survival, only determination.

We who are liberal and progressive know that the poor are our equals in every sense except that of being equal to us.

I think Picasso was, without doubt, the greatest portraitist of the 20th century, if not any other century.

Flattery makes fools of the best of us.

There's a thrill in the midst of the hardship in knowing that I'm making the invisible real. And I'm doing what I want.

Well, to tell you truth, I have learned a long time ago that the trick when doing a debate, any kind of debate, is to just turn off the judgment switch in my head.

Wherever the standard of freedom and independence has been or shall be unfurled, there will be America's heart, her benedictions and her prayers.

Probably the most neglected friend you have is you.

No, I think that if he had known he would be president, he would have started dying his hair, like, 10 years ago. Now it's too late.

For many Americans, Osama bin Laden is the paradigmatic Muslim, an absurd conviction for anyone who has lived with Muslims.