For remember how many serve mankind who do no more than meditate; and how many are precious to their friends for no more than a sweet and joyous temper.

To perform the function of a man of letters it is not necessary to write; nay, it is perhaps better to be a living book.

So long as we love we serve; so long as we are loved by others, I would almost say that we are indispensable; and no man is useless while he has a friend.

The true services of life are inestimable in money, and are never paid.

Kind words and caresses, high and wise thoughts, humane designs, tender behaviour to the weak and suffering, and all the charities of man's existence, are neither bought nor sold.
Yet the dearest and readiest, if not the most just, criterion of a man's services, is the wage that mankind pays him or, briefly, what he earns.
There at least there can be no ambiguity.