Stupidity,--unconscious ignorance.
Man was created a little lower than the angels and has been getting a little lower ever since.
We should make virtue our master, not our servant.
Our continual desire for praise ought to convince us of our mortality, if nothing else will.
the squeeky wheel gets the grease.
Threescore years and ten is enough; if a man can't suffer all the misery he wants in that time, he must be numb.