In Romans 7:25-8:2, Paul contrasted the Law of God with the law of sin and contrasted the Law of the Spirit of Life with the law of sin and death, so he equated the Torah with the Law of the Spirit, which straightforwardly make sense because the Torah was given by God and the Spirit is God. Furthermore, in Romans 8:4-7, Paul contrasted those who walk in the Spirit with those who have minds set on the flesh who are enemies of God who refuse to submit to the Torah.
If it is by the Torah that we have knowledge of what sin is, then why do you not consider repenting from our sin to be under the Torah? A sum is not more or less than all of its parts. In Matthew 22:36-40, Jesus said that all of the other commandments hang on the greatest two, so if you think that we should obey the greatest two commandments, then you should also think that we should obey all of the commandments that hang on them. For example, if we love God and our neighbor, then we won't commit adultery, theft, murder, idolatry, kidnapping, rape, favoritism, and so forth for the rest of the commandments. In Matthew 24:12-14, Jesus said that because of lawlessness the love of many will grow cold, which does not leave any room for thinking that we just need to obey the command to love at the exclusion of the other commandments for how to love.