The activity of happiness must occupy an entire lifetime; for one swallow does not a summer make.

Should a man live underground, and there converse with the works of art and mechanism, and should afterwards be brought up into the open day, and see the several glories of the heaven and earth, he would immediately pronounce them the work of such a Being as we define God to be.

But if nothing but soul, or in soul mind, is qualified to count, it is impossible for there to be time unless there is soul, but only that of which time is an attribute, i.e. if change can exist without soul.

No man of high and generous spirit is ever willing to indulge in flattery; the good may feel affection for others, but will not flatter them.

Since we think we understand when we know the explanation, and there are four types of explanation (one, what it is to be a thing; one, that if certain things hold it is necessary that this does; another, what initiated the change; and fourth, the aim), all these are proved through the middle term.

Art not only imitates nature, but also completes its deficiencies.

It is the active exercise of our faculties in conformity with virtue that causes happiness, and the opposite activities its opposite.