I have not failed. I have successfully discovered 1200 ideas that don't work.
The great trouble is that the preachers get the children from six to seven years of age and then it is almost impossible to do anything with them.
Fools call wise men fools. A wise man never calls any man a fool.
The perils of overwork are slight compared with the dangers of inactivity.
I never did anything by accident, nor did any of my inventions come by accident; they came by work.
Everything comes to him who hustles while he waits.