 Where there are only beings by aggregation [composite objects], there are no real beings. For every being by aggregation presupposes beings endowed with real unity [simples], because every being derives its reality only from the reality of those beings of which it is composed, so that it will not have any reality at all if each being of which it is composed is itself a being by aggregation, a being for which we must still seek further grounds for its reality, grounds which can never be found in this way, if we must always continue to seek for them.