Pollutions of the world

2nd Peter 20-22 teaches us that it better for us to not have known righteousness than to have known it and choose the world. Heavenly Father has given us a way to be forgiven for our sins.  The atonement is a wonderful gift that we must make sure we take advantage of. so that we can return to Heavenly Father and Jesus Christ.  What we must remember is that when we are forgiven for that sin it is as if nothing happened.  However, if we choose to commit the sin again then we didn't really learn to not repeat the sin again and so we are then held accountable for the original sin and it is a harder path to forgiveness.  We learn to seek out activities that will lead us to living a righteous life and not one that will take us away from having and eternal life.