Quote by Samuel Butler, Erewhon
Every one is a genius, more or less. No one is so physically sound that no part of him will be even a little unsound, and no one is so diseased but that some part of him will be healthy -- so no man is so mentally and morally sound, but that he will be in part both mad and wicked; and no man is so mad and wicked but he will be sensible and honourable in part. In like manner there is no genius who is not also a fool, and no fool who is not also a genius.
Summary
The quote suggests that every individual possesses both positive and negative qualities. No one is completely physically healthy or sick, mentally sound or mad, or morally good or wicked. Similarly, everyone has a combination of genius and foolishness within them. This means that even the most intelligent and gifted person is not exempt from moments of ignorance or foolishness, while even someone who may often make foolish decisions can display bursts of genius. Ultimately, it highlights the complexity and multifaceted nature of human beings, emphasizing that no individual is wholly one thing or the other.