Wisdom is the capacity to think clearly about which paths of action would be beneficial and expedient in general, rather than to any specific aim, as would be more likely in the field of art. Also, wisdom is concerned with doing rather than producing, which distinguishes it from art. Finally, wisdom is the ability to make appropriate judgments about particular situations. Aristotle defines wisdom as the knowledge of what ought to be done and the power to do them. It is the virtue that guides us in our actions and makes us act properly in each situation as we find it. The sage knows what ought to be done because she has studied human nature and learned how to best benefit her friends and protect them from harm. She also knows what types of actions will bring about what results because she has observed other people in various circumstances and can therefore predict how they will react to certain events. Last, but not least, the sage knows when to act and when not to act, because she has mastered herself and knows when it is best for her to stay quiet and let others decide what they will do or not do. Aristotle says that wisdom is the greatest of the virtues because without it none of the other virtues are possible. Without wisdom you cannot make good decisions or live by faith. It is the first virtue that comes naturally to some people and can be developed in others.