Are you under Christ or under Old Testament Law

It is interesting how many christians choose to follow parts of the old covenant, even after Christ fulfilled it and replaced it with a new perfect covenant. Galatians says if the law could save you, Christ would be of no value. It also states that if you retreat to part of the law, you must keep the whole law. So why do we seek to go back to the law that brings condemnation, rather than continuing in the grace of Jesus. We once again have a choice to make, Do I want to follow the new covenant of grace and mercy bought and paid for by Jesus with his own blood, or would I rather follow the old covenant of legalism and condemnation. The Old Testament was meant as shadow of what was to come, and has now been fulfilled, and we now live under the New Testament, and cannot return to the Old Testament in whole or as is more common in part for personal gain, and still hope for grace. It is most common to use the Old Testament when it comes time to preach on giving, to continue to bind people to the tithe, which is not found in the new covenant. Beware when you choose to go back under the law in one thing you must keep it all, so if you demand the tithe you need to also demand the sacrifices of goats, lambs and doves. You should also only accept the tithe in grocery form, rather than money, because that is how the Jewish people tithed before the coming of Jesus.