note); therefore (III. iii.), the emotion will cease to be a passion. Q.E.D.
Corollary—An emotion therefore becomes more under our control, and the mind is less passive in respect to it, in proportion as it is more known to us.
PROP. IV. There is no modification of the body, whereof we cannot form some clear and distinct conception.
Proof.—Properties which are common to all things can only be conceived adequately (II. xxxviii.); therefore (II. xii. and Lemma ii. after II. xiii.) there is no modification of the body, whereof we cannot form some clear and distinct conception. Q.E.D.
Corollary.—Hence it follows that there is no emotion, whereof we cannot form some clear and distinct conception. For an emotion is the idea of a modification of the body (by the general Def. of the Emotions), and must therefore (by the preceding Prop.) involve some clear and distinct conception.
Note.—Seeing that there is nothing which is not followed by an effect (I. xxxvi.), and that we clearly and distinctly understand whatever follows from an