The most positive men are the most credulous.

The most imaginative people are the most credulous, for them everything is possible.

Men must be taught as if you taught them not, and things unknown proposed as things forgot.

Spreads his light wings, and in a moment flies.

All seems infected that the infected spy, As all looks yellow to the jaundiced eye

Many men have been capable of doing a wise thing, more a cunning thing, but very few a generous thing