“Goodness is the only investment that never fails.”

Henry David Thoreau

I think what Henry is trying to say is that many other investments may fail but the only one that doesn’t is goodness, I guess everything you do with good intentions and with goodness never fails. Everything you put hard work into, and dedication will come out positive and not negative. I think maybe he’d try to encourage people to do things with good intentions. Out of all investments that you make, goodness is the only one who won’t let you down.