25. It is clear, then, Cic. de Off. III. 6. that all must consider and hold that the advantage of the individual is the same as that of all, and that nothing must be considered advantageous except what is for the general good. For how can one be benefited alone? That which is useless to all is harmful. I certainly cannot think that he who is useless to all can be of use to himself. For if there is one law of nature for all, there is also one state of usefulness for all. And we are bound by the law of nature to act for the good of all. It is not, therefore, right for him who wishes the interests of another to be considered according to nature, to injure him against the law of nature.