Satan is a liar and the father of all lies. When he tempts you with evil he will present it as good. Even Satanist believe in doing good, but love thy self. However this is what separates the wheat from the weeds, love does not seek self, love seeks to serve and give, and most important love speaks the truth, it will not let their neighbor harm themselves even if they think its good. Your actions affect others. It's not judging if i'm telling you what you are drinking is poison, no, is it my expression of love. You can believe you can fly all you want by jumping off a building but the truth of gravity will prove you wrong. I'm not judging you by telling you such facts. What I believe is not just some figment of my imagination it actually corresponds to reality. God did not give us commandments to be a cosmic killjoy, he gave us these commands to set perimeters around our lives so that our joy may be complete.
Jesus said to him, “ ‘You shall love the Lord your God with all your heart, with all your soul, and with all your mind.’ This is the first and great commandment. And the second is like it: ‘You shall love your neighbor as yourself.’ On these two commandments hang all the Law and the Prophets.”
Matthew 22:37-40 NKJV
Owe no one anything except to love one another, for he who loves another has fulfilled the law. For the commandments, “You shall not commit adultery,” “You shall not murder,” “You shall not steal,” “You shall not bear false witness,” “You shall not covet,” and if there is any other commandment, are all summed up in this saying, namely, “You shall love your neighbor as yourself.” Love does no harm to a neighbor; therefore love is the fulfillment of the law.
Romans 13:8-10 NKJV