Pure mathematics is, in its way, the poetry of logical ideas.

I've done a lot of things I'm not proud of, such as getting my girlfriend pregnant when I was 23 and the way I handled that.

The virtues, like the Muses, are always seen in groups. A good principle was never found solitary in any breast.

I feel exhausted if I teach too long.

All human actions have one or more of these seven causes: chance, nature, compulsions, habit, reason, passion, desire.

One of the advantages of renting a house is that you can easily change it if you don’t like it.

It is about one's wisdom that came with the years of hardship.

Forget not that the grossest crime is to compromise with injustice and wrong. Remember the eternal law: You must give, if you want to get.

Those who excel in virtue have the best right of all to rebel, but then they are of all men the least inclined to do so.

Love and compassion are necessities, not luxuries. Without them humanity cannot survive.

I believe God is managing affairs and that He doesn't need any advice from me. With God in charge, I believe everything will work out for the best in the end. So what is there to worry about. 

The man who will use his skill and constructive imagination to see how much he can give for a dollar, instead of how little he can give for a dollar, is bound to succeed.