Mercury in the ninth house denotes a love of knowledge, an enquiring and studious mind. Unless well aspected this position is not altogether favourable, but if the horoscope indicates power to concentrate, the position is improved. If afflicted it denotes a tendency to worry, and to become engaged in too many things at one time, also to wander and take aimless journeys. It causes the native to entertain many contradictory opinions and to waver and become far too indecisive for his own good. If well aspected it gives literary ability, and a keen appreciation of art, science, and all things which help to improve the mind. If unaspected it is not likely to affect the native to any marked degree, but in this case much will depend upon the sign it is in.