In the world of space exploration, once a rocket leaves the launching pad, it has no business with the earth until its assignment in the space is accomplished. And so, we Christians are not expected to meddle with sin the moment we become born-again.
The Lord's Chosen has been divinely endowed to awaken the conscience of human race towards the realization of this vital grace of God, which enables us to make heaven at last. John 14:1-3 says, Let not your heart be troubled: ye believe in God, believe also in me.