But it is the knowledge of necessary and eternal truths which distinguishes us from mere animals, and gives us reason and the sciences, raising us to knowledge of ourselves and God. It is this in us which we call the rational soul or mind.

I do not conceive of any reality at all as without genuine unity.

Every substance is as a world apart, independent of everything else except God.

I am convinced that the unwritten knowledge scattered among men of different callings surpasses in quantity and in importance anything we find in books, and that the greater part of our wealth has yet to be recorded.

To love is to be delighted by the happiness of someone, or to experience pleasure upon the happiness of another. I define this as true love.

It is unworthy of excellent men to lose hours like slaves in the labor of calculation which could be relegated to anyone else if machines were used.

It is a good thing to proceed in order and to establish propositions. This is the way to gain ground and to progress with certainty.