When asked how he came to possess such great wisdom, Lokman replied: "It is in seeing the actions of vicious and wicked people and comparing them with what my conscience tells me regarding such actions, that I have learned what I ought to avoid and what I ought to do. The wise and prudent man will draw a useful lesson even from poison itself, while the precepts of the wisest man mean nothing to the thoughtless."
--from Lokman,World's Great Men of Color, J.A. Rogers, Vol. 1