My friend, the truth is always implausible, did you know that? To make the truth more plausible, it's absolutely necessary to mix a bit of falsehood with it. People have always done so.
If you have done good, set your mind upon it so that it may be repeated over and over again. Allow yourself to be pleased by good. Accumulating good is joyful.
By pursuing his own interest (the individual) frequently promotes that of the society more effectually than when he really intends to promote it. I have never known much good done by those who affected to trade for the public good.