The noblest pleasure is the joy of understanding.
Iron rusts from disuse, stagnant water loses its purity, and in cold weather becomes frozen; even so does inaction sap the vigors of the mind.
He who truly knows has no occasion to shout.
Beyond a doubt truth bears the same relation to falsehood as light to darkness.
Every action needs to be prompted by a motive.
All our knowledge has its origin in our perceptions.
When once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return.
The knowledge of all things is possible.
Poor is the pupil who does not surpass his master.
Why does the eye see more clearly when asleep than the imagination when awake?
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
Where the spirit does not work with the hand, there is no art.
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.