True friends visit us in prosperity only when invited, but in adversity they come without invitation.

Alcmaeon was the first to define the difference between man and animals, saying that man differs from the latter in the fact that he alone has the power of understanding.

Time is the most valuable thing a man can spend.

Slovenliness is a lazy and beastly negligence of a man's own person, whereby he becomes so sordid as to be offensive to those about him.

Waste of time is the most extravagant and costly of all expenses.

Love is the affection of a mind that has nothing better to engage it.

Anaximenes ... also says that the underlying nature is one and infinite ... but not undefined as Anaximander said but definite, for he identifies it as air; and it differs in its substantial nature by rarity and density. Being made finer it becomes fire; being made thicker it becomes wind, then cloud, then (when thickened still more) water, then earth, then stones; and the rest come into being from these.