Now nature, in order to put us into the right way of coming at real knowledge, has not only implanted in our minds an eager desire or thirst after knowledge, but likewise a strong disposition to emulate all the works of nature that fall more immediately under our cognisance, and in a manner to vie with nature in productions of our own. This disposition to emulate nature, as it adds considerable force to our desire of knowledge, so it serves to assist us in acquiring it; for it necessarily leads and prompts us to copy what is done by nature, and thus makes us attend very closely to the object or phenomenon we would imitate, and try experiments about it; by which means alone, it is obvious, any real knowledge can be acquired. But not only is the knowledge of nature owing to this imitative principle in our minds, together with our desire of knowledge; but hence likewise proceed all the imitative arts, Poetry, Painting, Statuary, &c. Whatever we see performed by nature, we are emulous and restless to perform something like it, and so to rival nature.
George Turnbull, The Principles of Moral Philosophy (1740), p. 45.
