Would you believe it, dear friend, from these gloomy thoughts and apparent contradictions, there was shaped in my mind the sublime idea of the soul, which all my seeking had hitherto failed to discover? While I meditated upon man's nature, I seemed to discover two distinct principles in it; one of them raised him to the study of the eternal truths, to the love of justice, and of true morality, to the regions of the world of thought, which the wise delight to contemplate; the other led him downwards to himself, made him the slave of his senses, of the passions which are their instruments, and thus opposed everything suggested to him by the former principle. When I felt myself carried away, distracted by these conflicting motives, I said, No; man is not one; I will and I will not; I feel myself at once a slave and a free man; I perceive what is right, I love it, and I do what is wrong; I am active when I listen to the voice of reason; I am passive when I am carried away by my passions; and when I yield, my worst suffering is the knowledge that I might have resisted. Young man, hear me with confidence. I will always be honest with you. If conscience is the creature of prejudice, I am certainly wrong, and there is no such thing as a proof of morality; but if to put oneself first is an inclination natural to man, and if the first sentiment of justice is moreover inborn in the human heart, let those who say man is a simple creature remove these contradictions and I will grant that there is but one substance.