The will of man or animal is either effective or ineffective in the sensory context. When the will is effective then it also seems to be free of internal and external constraints. When the will is ineffective then something internal or external to the body seems to impede or interfere with the experience and expression of will. Prudence is defined as the ability to govern action by the use of reason. I define reason, in this context, as the mature human ability to anticipate the consequences of actions in the sensory context. A rational or irrational action translates into a human moral judgment, passed on the actions of the self or other humans (but not so much passed on the behavior of animals), as to whether the action is based on the ability to anticipate or plan consequences in the human social context or when a human interacts with non-human attributes of reality.