The price of greatness is responsibility. 

Be more dedicated to making solid achievements than in running after swift but synthetic happiness.

Computers themselves, and software yet to be developed, will revolutionize the way we learn.

Our heritage and ideals, our code and standards - the things we live by and teach our children - are preserved or diminished by how freely we exchange ideas and feelings.

The chief condition on which, life, health and vigor depend on, is action. It is by action that an organism develops its faculties, increases its energy, and attains the fulfillment of its destiny.

Man is a universe within himself.

We are shaped by our thoughts; we become what we think. When the mind is pure, joy follows like a shadow that never leaves.

Better than worshiping gods is obedience to the laws of righteousness.

I do not believe in immortality of the individual, and I consider ethics to be an exclusively human concern with no superhuman authority behind it.  

First was the mouse. The second was the click wheel. And now, we're going to bring multi-touch to the market. And each of these revolutionary interfaces has made possible a revolutionary product - the Mac, the iPod and now the iPhone.

Reflect upon your present blessings of which every man has many - not on your past misfortunes, of which all men have some.

Friendship is essentially a partnership.