" The ancient Greeks had an appropriate metaphor for this: the rider and the horse. The horse is our emotional nature continually impelling us to move. This horse has tremendous energy and power, but without a rider it cannot be guided; it is wild, subject to predators, and continually heading into trouble. The rider is our thinking self. Through training and practice, it holds the reins and guides the horse, transforming this powerful animal energy into something productive. The one without the other is useless. Without the rider, no directed movement or purpose. Without the horse, no energy, no power. In most people the horse dominates, and the rider is weak. In some people the rider is too strong, holds the reins too tightly, and is afraid to occasionally let the animal go into a gallop. The horse and rider must work together. This means we consider our actions beforehand; we bring as much thinking as possible to a situation before we make a decision. But once we decide what to do, we loosen the reins and enter action with boldness and a spirit of adventure. Instead of being slaves to this energy, we channel it. That is the essence of rationality. As an example of this ideal in action, try to maintain a perfect balance between skepticism (rider) and curiosity (horse). In this mode you are skeptical about your own enthusiasms and those of others. You do not accept at face value people’s explanations and their application of “evidence.” You look at the results of their actions, not what they say about their motivations. But if you take this too far, your mind will close itself off from wild ideas, from exciting speculations, from curiosity itself. You want to retain the elasticity of spirit you had as a child, interested in everything, while retaining the hard-nosed need to verify and scrutinize for yourself all ideas and beliefs. The two can coexist. It is a balance that all geniuses possess. "
― Robert Greene , The Laws of Human Nature