ns are caused by love. Therefore hatred also, since it is an
emotion of the soul, is caused by love.

_I answer that,_ As stated above (A. 1), love consists in a certain
agreement of the lover with the object loved, while hatred consists
in a certain disagreement or dissonance. Now we should consider in
each thing, what agrees with it, before that which disagrees: since a
thing disagrees with another, through destroying or hindering that
which agrees with it. Consequently love must needs precede hatred;
and nothing is hated, save through being contrary to a suitable thing
which is loved. And hence it is that every hatred is caused by love.

Reply Obj. 1: The opposite members of a division are sometimes
naturally simultaneous, both really and logically; e.g. two species
of animal, or two species of color. Sometimes they are simultaneous
logically, while, in reality, one precedes, and causes the other;
e.g. the species of numbers, figures and movements. Sometimes they
are not simultaneous either really or logically; e.g. substance and
accident; for substance is in reality the cause of accident; and
being is predicated of substance before it is predicated of accident,
by a priority of reason, because it is not predicated of accident
except inasmuch as the latter is in substance. Now love and hatred
are naturally simultaneous, logically but not really. Wherefore
nothing hinders love from being the cause of hatred.

Reply Obj. 2: Love and hatred are contraries if considered in respect
of the same thing. But if taken in respect of contraries, they are
not themselves contrary, but consequent to one another: for it
amounts to the same that one love a certain thing, or that one hate
its contrary. Thus love of one thing is the cause of one's hating its
contrary.

Reply Obj. 3: In the order of execution, the turning away from one
term precedes the turning towards the other. But the reverse is the
case in the order of intention: since approach to one term is the
reason for turning away from the other. Now the appetitive movement
belongs rather to the order of intention than to that of execution.
Wherefore love precedes hatred: because each is an appetitive
movement.
________________________

THIRD ARTICLE [I-II, Q. 29, Art. 3]

Whether Hatred Is Stronger Than Love?

Objection 1: It would seem that hatred is stronger than love. For
Augustine says (QQ. 83, qu. 36): "There is no one who does not flee
from pain, more than he