Since this double relation is necessary where an affection has both a distinct cause, and object, how much more so, where it has only a distinct object, without any determinate cause?
SECT.

XII OF THE LOVE AND HATRED OF ANIMALS But to pass from the passions of love and hatred, and from their mixtures and compositions, as they appear m man, to the same affections, as they display themselves in brutes; we may observe, not only that love and hatred are common to the whole sensitive creation, but likewise that their causes, as above-explained, are of so simple a nature, that they may easily be supposed to operate on mere animals.

There is no force of reflection or penetration required.

Every thing is conducted by springs and principles, which are not peculiar to man, or any one species of animals.

The conclusion from this is obvious in favour of the foregoing system.
Love in animals, has not for its only object animals of the same species, but extends itself farther, and comprehends almost every sensible and thinking being.