A diamond is just a lump of coal that stuck to its job.
True and great love springs out of great knowledge, and where you know little you can love but little or not at all.
Just as iron rusts from disuse, and stagnant water putrefies, or when cold turns to ice, so our intellect wastes unless it is kept in use.
Vitality and beauty are gifts of Nature for those who live according to its laws.
Truth is so excellent, that if it praises but small things they become noble.
Intellectual passion dries out sensuality.