v.), we can conceive infinite degrees and modes of strength in this emotion (IV.

iii.); we can, therefore, conceive it as capable of restraining stimulation, and preventing its becoming excessive, and hindering the body's capabilities; thus, to this extent, it will be good.

Q.E.D.
PROP.XLIV.

Love and desire may be excessive.
Proof .-- Love is pleasure, accompanied by the idea of an external cause (Def.

of Emotions, vi.); therefore stimulation, accompanied by the idea of an external cause is love (III.