There are two sentences inscribed upon the Delphic oracle, hugely accommodated to the usages of man's life: "Know thyself," and "Nothing too much;" a… - Plutarch

anger does not, as Melanthius says, — Displace the mind, and then act dismal things; but it absolutely turns the mind out of doors, and bolts the door against it; and, like those who burn their houses and themselves within them, it makes all things within full of confusion, smoke, and noise, so that the soul can neither see nor hear any thing that might relieve it. Wherefore sooner will an empty ship in a storm at sea admit of a pilot from without, than a man tossed with anger and rage listen to the advice of another, unless he have his own reason first prepared to entertain it.

it is useful, or rather it is necessary, not to be indifferent about acquiring the works of earlier writers, but to make a collection of these, like a set of tools in farming. For the corresponding tool of education is the use of books, and by their means it has come to pass that we are able to study knowledge at its source.

The truly pious must negotiate a difficult course between the precipice of godlessness and the marsh of superstition.