The eyes express more than anything else does, by their movements, the ideas behind them. Very often intuitive people say, "I perceived from that person's look pleasure," or "displeasure," or "his favorable or unfavorable attitude." And yet many do not know what movement, what expression, suggested to them what they perceived. Every expression of the eyes -- the eyes, which change their expression so many times in one minute -- suggests the idea behind. This shows that the mind is an engineer and the body is a mechanism which it works. If the engineer becomes conscious of his working the engineer also becomes a mechanism.