Follow the path of the unsafe, independent thinker. Expose your ideas to the danger of controversy. Speak your mind and fear less the label of 'crackpot' than the stigma of conformity. 

If I were not a physicist, I would probably be a musician. I often think in music. I live my daydreams in music. I see my life in terms of music. 

The least initial deviation from the truth is multiplied later a thousandfold.

The things that we use today are products of our cultural heritage and economic development.

What we want to do is make a leapfrog product that is way smarter than any mobile device has ever been, and super-easy to use. This is what iPhone is. OK? So, we're going to reinvent the phone.

The pursuit of truth and beauty is a sphere of activity in which we are permitted to remain children all our lives.

The way to get started is to quit talking and begin doing.

I count him braver who overcomes his desires than him who conquers his enemies; for the hardest victory is over self.

It stands to the everlasting credit of science that by acting on the human mind it has overcome man's insecurity before himself and before nature.

Citizenship consists in the service of the country.

Don't gain the world and lose your soul; wisdom is better than silver or gold.

The hunger for love is much more difficult to remove than the hunger for bread.