He is unworthy of the name of man who is ignorant of the fact that the diagonal of a square is incommensurable with its side.

Human behavior flows from three main sources: desire emotion and knowledge.

Science is nothing but perception.

Reality is created by the mind. We can change our reality by changing our mind.

If you do not take an interest in the affairs of your government, then you are doomed to live under the rule of fools.

A wise man speaks because he has something to say; a fool because he has to say something.

No one is more hated than he who speaks the truth.

Don't force your children into your ways, for they were created for a time different from your own.

Good people do not need laws to tell them to act responsibly, while bad people will find a way around the laws.

Reality is created by the mind, we can change our reality by changing our mind.

Enjoy life. There's plenty of time to be dead. Be kind, for everyone you meet is fighting a harder battle.

You will never know all there is to know. You will learn until your final days. Then you will inspire someone else. This is what an artist does.

I pledge to you today that as president, in my first budget, I will introduce the largest increase in special education ever.

I know there's nothing that I wouldn't do Go to the ends of the earth for you To make you feel my love

You know, Leonard Cohen is amazing, just a mastermind, and really one of the great geniuses of our time.

The cooperation of government at its different levels is important and can only be achieved as long as the people of Chicago are directly involved in our efforts and supportive of our goals.

Exoticism can give you an edge: it makes people assume you're cleverer than you are and gives you the upper hand.

Hard work is the only way to go. Strive to be the best you can be and remember that when you try your best, you can't ask any more from yourself, and people can't ask any more from you.

When you walk through that door of opportunity you don't slam it shut behind you.

Anyone who is not a liberal in his youth has no heart. Anyone who remains so as he matures has no brain!