Infinite divisibility

Nothing is more pleasant to the fancy, than to enlarge itself, by degrees, in its contemplation of the various proportions which its several objects bear to each other, when it compares the body of man to the bulk of the whole earth, the earth to the circle it describes round the sun, that circle to the sphere of the fixed stars, the sphere of the fixed stars to the circuit of the whole creation, the whole creation itself to the infinite space that is every where diffused about it; or when the imagination works downward, and considers the bulk of a human body, in respect of an animal, a hundred times less than a mite, the particular limbs of such an animal, the different springs which actuate the limbs, the spirits which set these springs a-going, and the proportionable minuteness of these several parts, before they have arrived at their full growth and perfection. But if, after all this, we take the least particle of these animal spirits, and consider its capacity of being wrought into a world, that shall contain within those narrow dimensions a heaven and earth, stars and planets, and every different species of living creatures, in the same analogy and proportion they bear to each other in our own universe; such a speculation, by reason of its nicety, appears ridiculous to those who have not turned their thoughts that way, though, at the same time, it is founded on no less than the evidence of a demonstration. Nay, we might yet carry it farther, and discover in the smallest particle of this little world, a new inexhausted fund of matter, capable of being spun out into another universe. 

Joseph Addison, The Spectator, No. 420