All learning has an emotional base.

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.

Wisdom tolerates blustered opinions, the better to dismiss them later with discovery.

[Talking pictures are] like putting lip rouge on the Venus de Milo.

Would that life were like the shadow cast by a wall or a tree but it is like the shadow of a bird in flight.

If we commit ourselves to reading thus increasing our knowledge, only God limits how far we can go in this world.

The chief end of science is to make things clear, the educative aim is to foster the inquisitive spirit.

If the rate of change on the outside exceeds the rate of change on the inside, the end is near.

You want a lesson? I'll give you a lesson. How about a geography lesson? My father's from Puerto Rico. My mother's from El Salvador. And neither one of those is Mexico.

We can appreciate each other's languages. And the question of being uncomfortable about our languages would go away.

Archie Bunker used to call me 'the laziest white kid he'd ever met.'

The whole object of education is...to develop the mind. The mind should be a thing that works.