Where the spirit does not work with the hand, there is no art.

Poor is the pupil who does not surpass his master.

Why does the eye see more clearly when asleep than the imagination when awake?

The noblest pleasure is the joy of understanding.

Realize that everything connects to everything else.

Obstacles cannot crush me; every obstacle yields to stern resolve.

Life is pretty simple: You do some stuff. Most fails. Some works. You do more of what works. If it works big, others quickly copy it. Then you do something else. The trick is the doing something else.

It had long since come to my attention that people of accomplishment rarely sat back and let things happen to them. They went out and happened to things.

“I have always felt it is my destiny to build a machine that would allow man to fly.

The deeper the feeling, the greater the pain

The time will come when men such as I will look upon the murder of animals as they now look on the murder of men.

Time stays long enough for those who use it.

Intellectual passion drives out sensuality.

I have offended God and mankind because my work didn't reach the quality it should have.

Water is the driving force in nature.

God sells us all things at the price of labor.

All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.

He who thinks little errs much…

A poet knows he has achieved perfection not when there is nothing left to add, but when there is nothing left to take away.