Procreation is nature's principal occupation, and every man, whether he be young or old, when meeting every woman measures the potentiality of sex between them.

Nature is pleased with simplicity. And nature is no dummy.

Nature is full of infinite reasons which have not yet passed into experience.

The wisest and noblest teacher is nature itself.

The eye, the window of the soul, is the chief means whereby the understanding can most fully and abundantly appreciate the infinite works of Nature; and the ear is second.

Nature appears to have been the cruel stepmother rather than the mother of many animals.