I am a citizen of the world, known to all and to all a stranger. - Erasmus

Whatever you see in the more material part of yourself, learn to refer to God and to the invisible part of yourself. In that way, whatever offers itself to the senses will become for you an occasion for the practice of piety.

Animals destitute of reason live with their own kind in a state of social amity. Elephants herd together; sheep and swine feed in flocks; cranes and crows take their flight in troops; storks have their public meetings to consult previously to their emigration, and feed their parents when unable to feed themselves; dolphins defend each other by mutual assistance; and everybody knows, that both ants and bees have respectively established by general agreement, a little friendly community.

I doubt if a single individual could be found from the whole of mankind free from some form of insanity. The only difference is one of degree. A man who sees a gourd and takes it for his wife is called insane because this happens to very few people.