Related to mastering your emotions is the ability to distance yourself from the present moment and think objectively about the past and future. Like Janus, the double-faced Roman deity and guardian of all gates and doorways, you must be able to look in both directions at once, the better to handle danger from wherever it comes. Such is the face you must create for yourself-one face looking continuously to the future and the other to the past.

For the future, the motto is, “No days unalert.” Nothing should catch you by surprise because you are constantly imagining problems before they arise. Instead of spending your time dreaming of your plan’s happy ending, you must work on calculating every possible permutation and pitfall that might emerge in it. The further you see, the more steps ahead you plan, the more powerful you become.

The other face of Janus looks constantly to the past—though not to remember past hurts or bear grudges. That would only curb your power. Half of the game is learning how to forget those events in the past that eat away at you and cloud your reason. The real purpose of the backward-glancing eye is to educate yourself constantly—you look at the past to learn from those who came before you. (The many historical examples in this book will greatly help that process.) Then, having looked to the past, you look closer at hand, to your own actions and those of your friends. This is the most vital school you can learn from, because it comes from personal experience.

You begin by examining the mistakes you have made in the past, the ones that have most grievously held you back. You analyze them in terms of the 48 laws of power, and you extract from them a lesson and an oath: “I shall never repeat such a mistake; I shall never fall into such a trap again.” If you can evaluate and observe yourself in this way, you can learn to break the patterns of the past—an immensely valuable skill.