The whole history of civilization is strewn with creeds and institutions which were invaluable at first, and deadly afterwards.
So long as there are earnest believers in the world, they will always wish to punish opinions, even if their judgment tells them it is unwise and their conscience that it is wrong.
It is good to be without vices, but it is not good to be without temptations.
A schoolmaster should have an atmosphere of awe, and walk wonderingly, as if he was amazed at being himself.
Progress would not have been the rarity it is if the early food had not been the late poison.
Life is a school of probability.