There is an obvious difference in Keep the Law and Under the Law, and if your teacher cannot explain the diff then you better run imo. As soon as they deflect like can be witnessed here, run.
It's plain enough! If you willfully and purposely set out to Keep the Law verbatim, through your flesh, then you have disregarded the Righteousness of Christ, which is by faith and is not of the Law!
And for all who do, they have "fallen from grace".
IOws, you are no longer under the Blood of Christ's sacrifice, but have purposely put yourself under the Law, in order to obtain your own form of righteousness.
Repent from your willful Law Keeping, and return to the One you are married to!
Iows, stop being an adulteress towards God.