For this purpose it is enough to lead you to distinguish between our acquired ideas and our natural feelings; for feeling precedes knowledge; and since we do not learn to seek what is good for us and avoid what is bad for us, but get this desire from nature, in the same way the love of good and the hatred of evil are as natural to us as our self-love.  The decrees of conscience are not judgments but feelings.  Although all our ideas come from without, the feelings by which they are weighed are within us, and it is by these feelings alone that we perceive fitness or unfitness of things in relation to ourselves, which leads us to seek or shun these things.

To exist is to feel; our feeling is undoubtedly earlier than our intelligence, and we had feelings before we had ideas.[Footnote:  In some respects ideas are feelings and feelings are ideas.  Both terms are appropriate to any perception with which we are concerned, appropriate both to the object of that perception and to ourselves who are affected by it; it is merely the order in which we are affected which decides the appropriate term.  When we are chiefly concerned with the object and only think of ourselves as it were by reflection, that is an idea; when, on the other hand, the impression received excites our chief attention and we only think in the second place of the object which caused it, it is a feeling.] Whatever may be the cause of our being, it has provided for our preservation by giving us feelings suited to our nature; and no one can deny that these at least are innate.  These feelings, so far as the individual is concerned, are self-love, fear, pain, the dread of death, the desire for comfort.  Again, if, as it is impossible to doubt, man is by nature sociable, or at least fitted to become sociable, he can only be so by means of other innate feelings, relative to his kind; for if only physical well-being were considered, men would certainly be scattered rather than brought together.  But the motive power of conscience is derived from the moral system formed through this twofold relation to himself and to his fellow-men.  To know good is not to love it; this knowledge is not innate in man; but as soon as his reason leads him to perceive it, his conscience impels him to love it; it is this feeling which is innate.

So I do not think, my young friend, that it is impossible to explain the immediate force of conscience as a result of our own nature, independent of reason itself.  And even should it be impossible, it is unnecessary; for those who deny this principle, admitted and received by everybody else in the world, do not prove that there is no such thing; they are content to affirm, and when we affirm its existence we have quite as good grounds as they, while we have moreover the witness within us, the voice of conscience, which speaks on its own behalf.  If the first beams of judgment dazzle us and confuse the objects we behold, let us wait till our feeble sight grows clear and strong, and in the light of reason we shall soon behold these very objects as nature has already showed them to us.  Or rather let us be simpler and less pretentious; let us be content with the first feelings we experience in ourselves, since science always brings us back to these, unless it has led us astray.