He who never puts his trust in any man will never be deceived.
He who thinks little errs much.
The Book of the science of Mechanics must precede the Book of useful inventions.
While I thought that I was learning how to live, I have been learning how to die.
People reveal themselves completely only when they are thrown out of the customary conditions of their life.
A diamond is just a lump of coal that stuck to its job.