Whether two precepts of charity suffice?

Objections

Objection 1 : It would seem that two precepts of charity do not suffice. For precepts are given about acts of virtue. Now acts are distinguished by their objects. Since, then, man is bound to love four things out of charity, namely, God, himself, his neighbor and his own body, as shown above (Question [25], Article [12]; Question [26]), it seems that there ought to be four precepts of charity, so that two are not sufficient.
Objection 2 : Further, love is not the only act of charity, but also joy, peace and beneficence. But precepts should be given about the acts of the virtues. Therefore two precepts of charity do not suffice.
Objection 3 : Further, virtue consists not only in doing good but also in avoiding evil. Now we are led by the positive precepts to do good, and by the negative precepts to avoid evil. Therefore there ought to have been not only positive, but also negative precepts about charity; and so two precepts of charity are not sufficient.