We don't know a millionth of one percent about anything.
The value of an idea lies in the using of it.
I have not failed. I've just found 10,000 ways that won't work.
Genius is one percent inspiration and ninety-nine percent perspiration.
Just because something doesn't do what you planned it to do doesn't mean it's useless.
The chief function of the body is to carry the brain around.
Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.
If we did all the things we are capable of, we would literally astound ourselves.