"Let me give you a few simple rules for learning to draw. First, see of what shape the whole thing is. Next, put in the line that marks the movement of the whole. Don't have more than one movement in a figure; you can't patch parts together. Simple lines; then simple values. Establish the fact of the whole. Is it square, oblong, cube, or what is it?"

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They have likewise discovered two lesser stars, or satellites, which revolve around Mars, whereof the innermost is distant from the center of the primary exactly three of his diameters, and the outermost five: the former revolves in the space of ten hours, and the latter in twenty-one and a half, so that the squares of their periodical times are very near in the same proportion with the cubes of their distances from the center of Mars; which evidently shows them to be governed by the same Law of Gravitation that influences the other heavenly bodies.

— Jonathan Swift