"The Holy Spirit also testifies to us about this. First he says: 'This is the covenant I will make with them after that time, says the Lord. I will put my laws in their hearts, and I will write them on their minds.' Then he adds: 'Their sins and lawless acts I will remember no more.' And where these have been forgiven, there is no longer any sacrifice for sin." NIV translation
As Christians, we do not need a religious leader to tell us what is right and wrong. As we see here, the laws of God are written on our hearts and mind by Him. We also see that our sins have been forgiven and we must remember that, when God forgives, it is like the sin never even happened.
As people, we like to forgive but keep the memory of the wrong in the back of our minds but, when God forgives, then it is also forgotten. Do you have someone in your life that always tries to bring up your past sins? If so, you can tell them that, in God's eyes, it is like they never even happened. Then, ask them if they think they are above God.