Don't feel bad for making decisions that upset other people. you're not responsible for their happiness, you're responsible for yours.

Early to bed and early to rise, makes a man healthy, wealthy, and wise.

Your vision will become clear only when you can look into your own heart. Who looks outside, dreams; who looks inside, awakes.

I do not feel obliged to believe that God has intended us to forgo the use of our reason.

The trees are our lungs, the rivers our circulation, the air our breath, and the earth our body.

We're in hell right now, gentlemen. We can climb out of hell, one inch at a time.

The beginning of knowledge is the discovery of something we do not understand