Jesus is Lord so we would obey what Jesus said,which is to love one another as He loved us,and to abstain from sins of the flesh.
1Sa 15:20 And Saul said unto Samuel, Yea, I have obeyed the voice of the LORD, and have gone the way which the LORD sent me, and have brought Agag the king of Amalek, and have utterly destroyed the Amalekites.
1Sa 15:21 But the people took of the spoil, sheep and oxen, the chief of the things which should have been utterly destroyed, to sacrifice unto the LORD thy God in Gilgal.
1Sa 15:22 And Samuel said, Hath the LORD as great delight in burnt offerings and sacrifices, as in obeying the voice of the LORD? Behold, to obey is better than sacrifice, and to hearken than the fat of rams.
1Sa 15:23 For rebellion is as the sin of witchcraft, and stubbornness is as iniquity and idolatry. Because thou hast rejected the word of the LORD, he hath also rejected thee from being king.
To obey is better than sacrifice,and if a person does not obey what Jesus taught,then how does His sacrifice apply in their life,for to obey is better than sacrifice.
We obeyed God when we repented of our sins,and confessed Christ,so why would we stop there.