The only certainties in life are death and taxes.
It is human to exaggerate the merits of the dead.
Our best built certainties are but sand-houses and subject to damage from any wind of doubt that blows
Never put off till tomorrow what you can do day after tomorrow just as well.
Every man is a moon; he has a side no one sees.
There is no such thing as a new idea. We simply take a lot of old ideas and put them into a sort of mental kaleidoscope.