...so remember: great achievements take time, there is no overnight success.

When you say, 'I can’t do that,' you're expressing yourself incorrectly. You should say, 'I couldn’t do that before.'

Some mathematician, I believe, has said that true pleasure lies not in the discovery of truth, but in the search for it.

Man survives earthquakes, epidemics, the horrors of disease, and all the agonies of the soul, but for all time his tormenting tragedy is, and will be, the tragedy of the bedroom.

If you want to be happy, just be.

Pierre was right when he said that one must believe in the possibility of happiness in order to be happy, and I now believe in it. Let the dead bury the dead, but while I'm alive, I must live and be happy.

He felt that all his hitherto dissipated and dispersed forces were gathered and directed with terrible energy towards one blissful goal.