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.