Learn to be as analytical about things of which you are credulous as you are of those which you criticise.

One of the tragedies of modern times is that people have come to believe that something said by someone in the past, perhaps for illustrative or provocation purposes, actually represents that person's beliefs at the time.

Wisdom is when you understand what, previously, at best you only knew.

A certain person may have, as you say, a wonderful presence; I do not know. What I do know is that he has a perfectly delightful absence.

Teach honesty by all means - you do know what it is, don't you?

The stupidest man I ever met had a favourite saying.
It was:
'What do you think I am, stupid, or something?