The reason people find it so hard to be happy is that they always see the past better than it was, the present worse than it is, and the future less resolved than it will be. French translation
My advice is to look out for engineers.
They begin with sewing machines and end up with nuclear bombs.
The most difficult secret for a man to keep is his own opinion of himself.
One has to look out for engineers - they begin with sewing machines and end up with the atomic bomb.