She said I didn't understand grace, and she insisted Jesus gave only two commands for New Covenant believers: Loving the Lord with all our hearts and loving our neighbor as ourselves (Matthew 22:37-40).
Actually, Jesus gave many commands, but these two are unique: they put all of the other commandments into context.
"The entire law and all the demands of the prophets are based on these two commandments.” (v.40)
If we love God with all our heart and our neighbor as ourselves, we won't violate a single other command.
And Christ made it clear that if we have no desire to obey Him, we don't know or love Him (John 14:15,21,23; John 15:10; 1 John 2:3; 1 John 5:3; 2 John 1:6).
Obedience and good works don't earn salvation, but they follow salvation.
And Christ's last command on earth was this:
"Go and make disciples ... teaching them to obey everything I have commanded you." Matthew 28:18-20
-----------------------Note #1: There is often confusion about which of the Old Testament commands apply to us today. No need to worry. Just concentrate on all the New Testament commands and you'll be fine. If you want to read more on this subject check out The Law Collection of 4 short articles.
Note #2: Some people believe the "red letter" words of Christ, and not the rest of the Bible. To dispel that misunderstanding, check out these links: Only the Words of Christ.