SYNTHESIS (σύν θέσις, a putting together, composition) — "consists in assuming the causes discovered and established as principles, and by them expla… - William Fleming

Moral Philosophy is the Science of human duty. The knowledge of human duty implies a knowledge of human nature. To understand what man ought to do, it is necessary to know what man is. Not that the Moral Philosopher, before entering upon those inquiries which peculiarly belong to him, must go over the Science of human nature in all its extent. But it is necessary to examine those elements of human nature which have a direct bearing upon human conduct.

The principle of deduction is, that things which agree with the same thing agree with one another. The principle of induction is, that in the same circumstances and in the same substances, from the same causes the same effects will follow. The mathematical and metaphysical sciences are founded on deduction; the physical sciences rest on induction.

Atheists are confounded with Pantheists, such as Xenophanes among the ancients, or Spinoza and Schelling among the moderns, who, instead of denying God, absorb everything into him.