VII. Another source, affording the proof of the existence of God, man finds in himself when his intellectual faculties have attained a certain degree of culture and maturity. He then knows himself to be a moral being; that is to say, a being who, placed between good and evil, can, of his own free will, adhere to the former and reject the latter, if he follows the dictates of his reason. Then the moral sense awakens in his mind the idea of a supreme blessing, of a progressive and infallible moral perfection, of a future final accord between virtue and felicity, and their necessary co-existence. Now, he cannot expect this supreme blessing from anything that surrounds him in nature, because he does not find in the latter the desired union of happiness with virtue, enjoyment with merit. He must, therefore, seek it in a Supreme Cause existing out of nature--in a Cause which should contain in itself the type of the moral law, embrace the whole extent of that law with infinite intelligence, and act up to its dictates with a powerful will. This Supreme Cause is God. CHAPTER II. VIII. MAN has many advantages and privileges over all other creatures. Not only can he, like other animals, perceive through his senses all the surrounding objects, but he can compare with one another the perceptions received, associate them together, separate them, and form new ideas. He can know for what purposes things exist, investigate their causes and effects, discern between good and evil, between just and unjust; he alone can communicate his thoughts to others; he alone can speak. IX. Everything produced by an intelligent Author must be intended for some purpose--must have a _destination_. Man, the noblest creature on earth, must also have a destination. We shall arrive at a clear knowledge of that destination, when we shall have considered the powers and capabilities possessed by him; for the means with which nature has endowed him, for the development of his activity, evidently point out the goal which that activity is designed to attain. X. Now, the capabilities that we discover in man are the following:--Besides a body constructed with wonderful skill, but weak, corruptible, mortal, man has within himself a vivifying principle, which substantiates in him the knowledge of things with the aid of the senses, renews in him perceptions once received, unites them, separates them, and forms out of them new ideas. This thinking principle is certainly different from the body, of which no part is apt to think, and is what we call the _soul_; the act itself of thinking proceeds from a faculty of the soul which we call _intellect_.