When they say the sky's the limit to me that's really true
To see me does not necessarily mean to see my face. To understand my thoughts is to have seen me.
Gratitude is an illness suffered by dogs.
I can never stand still. I must explore and experiment. I am never satisfied with my work. I resent the limitations of my own imagination.
The person who takes no chances generally has to take whatever is left when others are through choosing.
All thinking men are atheists.
It's not whether you got knocked down; it's whether you get back up.
I will take fate by the throat; it will never bend me completely to its will.
There is only one corner of the universe you can be certain of improving, and that's your own self.
I don't care what people think or say about me, I know who I am.
After climbing a great hill, one only finds that there are many more hills to climb.
Stand up to your obstacles and do something about them. You will find that they haven't half the strength you think they have.
People are capable, at any time in their lives, of doing what they dream of.
The three things that are most essential to achievement are common sense, hard work and stick-to-it-iv-nes
Isn't it astonishing that all these secrets have been preserved for so many years just so we could discover them!
Out of suffering have emerged the strongest souls; the most massive characters are seared with scars.
If you can accept losing, you can't win.
When you're at the end of your rope, tie a knot and hold on
The fact that the great scientist believed in flying machines was the one thing that encouraged us to begin our studies.
Freedom from the desire for an answer is essential to the understanding of a problem.
We cannot solve our problems with the same thinking we used when we created them.