We may thus readily conceive the power which clear and distinct knowledge, and especially that third kind of knowledge (II:xlvii.Note), founded on the actual knowledge of God, possesses over the emotions: if it does not absolutely destroy them, in so far as they are passions (V:iii. and V:iv.Note); at any rate, it causes them to occupy a very small part of the mind (V:xiv.). Further, it begets a love towards a thing immutable and eternal (V:xv.), whereof we may really enter into possession (II:xlv.); neither can it be defiled with those faults which are inherent in ordinary love; but it may grow from strength to strength, and may engross the greater part of the mind, and deeply penetrate it. And now I have finished with all that concerns this present life: for, as I said in the beginning of this note, I have briefly described all the remedies against the emotions. And this everyone may readily have seen for himself, if he has attended to what is advanced in the present note, and also to the definitions of the mind and its emotions, and, lastly, to Propositions III:i. and III:iii. It is now, therefore, time to pass on to those matters, which appertain to the duration of the mind, without relation to the body. Prop. XXI. The mind can only imagine anything, or remember what is past, while the body endures. Proof.- The mind does not express the actual existence of its body, nor does it imagine the modifications of the body as actual, except while the body endures (II:viii.Coroll.); and, consequently (II:xxvi.), it does not imagine any body as actually existing, except while its own body endures. Thus it cannot imagine anything (for definition of Imagination, see II:xvii.Note), or remember things past, except while the body endures (see definition of Memory, II:xviii.Note). Q.E.D. Prop. XXII. Nevertheless in God there is necessarily an idea, which expresses the essence of this or that human body under the form of eternity. Proof.- God is the cause, not only of the existence of this or that human body, but also of its essence (I:xxv.). This essence, therefore, must necessarily be conceived through the very essence of God (I:Ax.iv.), and be thus conceived by a certain eternal necessity (I:xvi.); and this conception. must necessarily exist in God (II:iii.). Q.E.D. Prop. XXIII. The human mind cannot be absolutely destroyed with the body, but there remains of it something which is eternal.