Why Should I Behave Piously If Reputation Can Be So Easily Destroyed

“The false rumor that Krishna had killed Prasena and had taken away the jewel was spread everywhere like wildfire. Krishna did not like to be defamed in that way, and therefore He decided that He would go to the forest and find the Syamantaka jewel, taking with Him some of the inhabitants of Dvaraka.” (Krishna, The Supreme Personality of Godhead, Vol 2, Ch 1)