As every divided kingdom falls, so every mind divided between many studies confounds and saps itself.
Anyone who conducts an argument by appealing to authority is not using his intelligence; he is just using his memory.
Iron rusts from disuse, stagnant water loses its purity and in cold weather becomes frozen; even so does inaction sap the vigors of the mind.
As a day well spent makes sleep seem pleasant, so a life well employed makes death pleasant. A life well spent is long.
