To forgive is indeed the best form of self-interest since anger, resentment, and revenge are corrosive of that summum bonum, the greatest good.
Now it is one thing to say I say it that people shouldn't consume psychoactive drugs. It is entirely something else to condone marijuana laws, the application of which resulted, in 1995, in the arrest of 588,963 Americans. Why are we so afraid to inform ourselves on the question?