He who advises a sick man, whose manner of life is prejudicial to health, is clearly bound first of all to change his patient's manner of life.
PlatoWhen a person supposes that he knows, and does not know; this appears to be the great source of all the errors of the intellect.
PlatoOf all the animals, the boy is the most unmanageable, inasmuch as he has the fountain of reason in him not yet regulated.
PlatoWe are like people looking for something they have in their hands all the time; we're looking in all directions except at the thing we want, which is probably why we haven't found it.
PlatoFor the man who makes everything that leads to happiness, or near to it, to depend upon himself, and not upon other men, on whose good or evil actions his own doings are compelled to hinge,--such a one, I say, has adopted the very best plan for living happily. This is the man of moderation; this is the man of manly character and of wisdom.
Plato