The following Maxims of common human Understanding do not properly come in here, as parts of the Critique of Taste; but yet they may serve to elucidate its fundamental propositions. They are: 1° to think for oneself; 2° to put ourselves in thought in the place of everyone else; 3° always to think consistently. The first is the maxim of unprejudiced thought; the second of enlarged thought; the third of consecutive thought. The first is the maxim of a Reason never passive.

The tendency to such passivity, and therefore to heteronomy of the Reason, is called prejudice; and the greatest prejudice of all is to represent nature as not subject to the rules that the Understanding places at its basis by means of its own essential law, i.e. is superstition.