We may be truthful or a liar. We may wish to be kind or cruel. God has decided that we ourselves shall choose. That searching question has bought Conscience to the forefront of human life. Conscience can never approve of anything bad.
Conscience can never tell a person to do what is wrong, or to think what is unpleasant.
Conscience is always on the side of excellence. That is the final arbiter of life - the authority of Conscience, the indwelling of the Holy Spirit, seeking to make right, reason, and the will of God prevail. Over the entire human race, working out its destiny on this Earth, there is only one supreme Master, one final Authority. And the Authority above us all is the Fatherhood of God. Whatever we do in this life let us remember that final authority - the Holy Spirit.