I have resolved to demonstrate by a certain and undoubted course of argument, or to deduce from the very condition of human nature, not what is new and unheard of, but only such things as agree best with practice.

I saw that all things I feared, and which feared me, had nothing good or bad in them save insofar as the mind was affected by them.

No to laugh, not to lament, not to detest, but to understand.

The more intelligible a thing is, the more easily it is retained in the memory, and counterwise, the less intelligible it is, the more easily we forget it.

Everyone has as much right as he has might.

To comprehend an idea, a person must simultaneously accept it as true. Conscious analysis - which, depending on the idea, may occur almost immediately or with considerable effort - allows the mind to reject what it intially accepted as fact.

Reason connot defeat emotion, an emotion can only be displaced or overcome by a stronger emotion.