The mind is interested in motivation, mysteries, psychism, death, and mysticism, often asking why. Mercury in Sagittarius is in detriment making the mind roving, versatile, aspiring, broad, exploring, and restless. Thoughts tend to be free, philosophical, religious, and intellectual, attempting to understand principles. The mind likes travel, changes, intellectual stimulation, teaching, athletics, and outdoor activities. Mercury in Capricorn makes the mind methodical, profound, resourceful, cautious, persevering, painstaking, dry, careful, serious, reserved, conservative, traditional, and observant.
Thoughts tend to be slow but deep, pragmatic, organized, discriminating, calculated, and orderly.
The mind can be manipulative, authoritarian, controlling, aware of limits, and responsible. Mercury in Aquarius is exalted making the mind scientific, inventive, original, strong, detached, theoretical, idealistic, and humanitarian. Thoughts tend to be clever, witty, eccentric, radical, dialectical, synthetic, perceptive, and socially conscious. The mind is psychological and likes to study people and social issues, often having very advanced ideas. Mercury in Pisces is in detriment making the mind intuitive, impressionable, sensitive, subtle, deep, changeable, indecisive, and receptive.