I don't know who my grandfather was; I'm much more concerned to know what his grandson will be.
If you can't feed a hundred people, then just feed one.
In life, you need either inspiration or desperation.
No matter what people tell you, words and ideas can change the world.
Only the wisest and stupidest of men never change.
Question with boldness even the existence of God; because, if there be one, he must more approve of the homage of reason than that of blindfolded fear.
However difficult life may seem, there is always something you can do and succeed at.
Everything you can imagine is real.
Great work requires great and persistent effort for a long time. … Character has to be established through a thousand stumbles.
The fact that the great scientist believed in flying machines was the one thing that encouraged us to begin our studies.
It's not whether you got knocked down; it's whether you get back up.
Ask for what you want and be prepared to get it!
I don't think necessity is the mother of invention. Invention ... arises directly from idleness, possibly also from laziness. To save oneself trouble.
What's the world's greatest lie?... It's this: that at a certain point in our lives, we lose control of what's happening to us, and our lives become controlled by fate.
You got to get it while you can.
Alone we can do so little; together we can do so much.
Whatever the mind of man can conceive and believe, it can achieve.
Today I shall behave, as if this is the day I will be remembered.
The world is the great gymnasium where we come to make ourselves strong.
Sovereignty is not given, it is taken.
To myself I am only a child playing on the beach, while vast oceans of truth lie undiscovered before me.