There are two sentences inscribed upon the Ancient oracle... "Know thyself" and "Nothing too much"; and upon these all other precepts depend.
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.
PlutarchIt is no great wonder if in long process of time, while fortune takes her course hither and thither, numerous coincidences should spontaneously occur. If the number and variety of subjects to be wrought upon be infinite, it is all the more easy for fortune, with such an abundance of material, to effect this similarity of results.
Plutarch