It appears that some passages in the Kritik der Praktischen Vernunft, which exactly suit this connection, were the immediate occasion of the verses. Thus, for instance, on p. 150 (R., p. 211) we find: “Obedience to the moral law, which a man feels incumbent on him, is based not on voluntary inclination, nor on endeavour willingly put forth, without any authoritative command, but on a sense of duty.” Yes, it must be commanded!

What slavish morality! And again on p. 213 (R., p. 257): “Feelings of compassion, and of tender-hearted sympathy would be actually troublesome to persons who think aright, because through such emotions their well weighed maxims would become confused, and so the desire would grow up to be rid of them, and to be subject solely to the lawgiver — Reason.