A man is not idle because he is absorbed in thought. There is a visible labor and there is an invisible labor.Victor Hugo
The omnipotence of evil has never resulted in anything but fruitless efforts. Our thoughts always escape from whoever tries to smother them.Victor Hugo
I wake up in the morning and my mind starts making sentences, and I have to get rid of them fast - talk them or write them down.Ernest Hemingway
All intelligent thoughts have already been thought; what is necessary is only to try to think them again.Johann Wolfgang von Goethe