God has no power over the past except to cover it with oblivion.
True happiness consists in being considered deserving of it.
No mortal man, moreover is wise at all moments.
Nature makes us buy her presents at the price of so many sufferings that it is doubtful whether she deserves most the name of parent or stepmother.
This only is certain, that there is nothing certain.
It [the earth] alone remains immoveable, whilst all things revolve round it.