Let a prince be guarded with soldiers, attended by councillors, and shut up in forts; yet if his thoughts disturb him, he is miserable.
PlutarchIf Nature be not improved by instruction, it is blind; if instruction be not assisted by Nature, it is maimed; and if exercise fail of the assistance of both, it is imperfect.
PlutarchWhen another is asked a question, take special care not to interrupt to answer it yourself.
PlutarchWe ought to give our friend pain if it will benefit him, but not to the extent of breaking off our friendship; but just as we make use of some biting medicine that will save and preserve the life of the patient. And so the friend, like a musician, in bringing about an improvement to what is good and expedient, sometimes slackens the chords, sometimes tightens them, and is often pleasant, but always useful.
Plutarch