Now the same justice that binds me to any individual of my fellow men binds me to the whole. If, while I confer a benefit upon one man, it appear, in striking an equitable balance, that I am injuring the whole, my action ceases to be right, and becomes absolutely wrong. But how much am I bound to do for the general weal, that is, for the benefit of the individuals of whom the whole is composed? Everything in my power. To the neglect of the means of my own existence? No; for I am myself a part of the whole.
Beside, it will rarely happen that the project of doing for others everything in my power will not demand for its execution the preservation of my own existence; or in other words, it will rarely happen that I cannot do more good in twenty years than in one. If the extraordinary case should occur in which I can promote the general good by my death more than by my life, justice requires that I should be content to die. In other cases, it will usually be incumbent on me to maintain my body and mind in the utmost vigour, and in the best condition for service.
Suppose, for example, that it is right for one man to possess a greater portion of property than another, whether as the fruit of his industry, or the inheritance of his ancestors. Justice obliges him to regard this property as a trust, and calls upon him maturely to consider in what manner it may be employed for the increase of liberty, knowledge and virtue. He has no right to dispose of a shilling of it at the suggestion of his caprice.
So far from being entitled to well earned applause, for having employed some scanty pittance in the service of philanthropy, he is in the eye of justice a delinquent if he withhold any portion from that service. Could that portion have been better or more worthily employed? That it could is implied in the very terms of the proposition. Then it was just it should have been so employed. -- In the same manner as my property, I hold my person as a trust in behalf of mankind. I am bound to employ my talents, my understanding, my strength and my time, for the production of the greatest quantity of general good. Such are the declarations of justice, so great is the extent of my duty.