There is far greater peril in buying knowledge than in buying meat and drink.
Our love for our children springs from the soul's greatest yearning for immortality.
If the head and the body are to be well, you must begin by curing the soul.
Perfect wisdom has four parts: Wisdom, the principle of doing things aright. Justice, the principle of doing things equally in public and private. Fortitude, the principle of not fleeing danger, but meeting it. Temperance, the principle of subduing desires and living moderately.
As it is, the lover of inquiry must follow his beloved wherever it may lead him.
The ludicrous state of solid geometry made me pass over this branch.