Let me say firstly that this is a most interesting subject to discuss with you and I am impressed with your knowledge and research. Also I think that you would like to say a lot more but want to be as short and to the point as possible.
Let me just again cite Galatians 3:10 where it says: "All who rely on observing the law are under a curse". Now do you think that it is a light matter for a person to bring himself under a curse from Almighty God?
Thank you for the kind words.
Galatians 3:10 does say that in isolation, and that is why it is important to put it in context of the surrounding verses and also to look at the origin of what the verse was based upon. Historical context is also of interest when we consider what I mentioned previously, that Galatians was written prior to Acts and in Acts we see Paul making timothy to be circumcised. You ask if it is something light for a person to bring himself under a curse-- I ask, do you think Paul would then force Timothy to be cursed? Not at all, because it is not the observance of the law that brings the curse it is reliance upon the law that brings the curse. This is where we must look at context (and also at the verse itself). Galatians 3:10 says that "all those who
rely..." Rely is a keyword in that verse, especially in context of the rest of Galatians 3. The problem was not in following the law, but in relying on the law for salvation. The essence of Galatians 3 is that salvation is through faith, not through observance of the law, and if man relies on the law then he is also bound by those curses of the law, but the law is not against God and is beneficial. That could sum up the entire essence of Galatians 3.
The law itself is not the problem, it is reliance on the law for salvation that Paul is saying is the problem. So, what are these curses? We must then back up to where Galatians 3:10 (second half of verse) comes from to see the curses. Galatians 3:10b "for it is written, 'Cursed is everyone who does not continue in all things which are written in the book of the law, to do them'." The origin: Deuteronomy 27:26 "‘Cursed is the one who does not confirm (all) the words of this law by observing them'," The version I have used here uses the word "all" in Deuteronomy, but it must be noted that in the original Hebrew the word all was not in there. It could be argued that it was implied. If you look at the previous verses in Deuteronomy then you can see where the curses were attached to:
Deut 27:15-26 Cursed is the one who makes a carved or molded image, an abomination to the LORD, the work of the hands of the craftsman, and sets it up in secret. And all the people shall answer and say, ‘Amen!’ Cursed is the one who treats his father or his mother with contempt. And all the people shall say, ‘Amen!’ Cursed is the one who moves his neighbor’s landmark. And all the people shall say, ‘Amen!’
Cursed is the one who makes the blind to wander off the road. And all the people shall say, ‘Amen!’
Cursed is the one who perverts the justice due the stranger, the fatherless, and widow. And all the people shall say, ‘Amen!’ Cursed is the one who lies with his father’s wife, because he has uncovered his father’s bed. And all the people shall say, ‘Amen!’ Cursed is the one who lies with any kind of animal. And all the people shall say, ‘Amen!’ Cursed is the one who lies with his sister, the daughter of his father or the daughter of his mother. And all the people shall say, ‘Amen!’ Cursed is the one who lies with his mother-in-law. And all the people shall say, ‘Amen!’ Cursed is the one who attacks his neighbor secretly. And all the people shall say, ‘Amen!’ Cursed is the one who takes a bribe to slay an innocent person. And all the people shall say, ‘Amen!’ Cursed is the one who does not confirm all the words of this law by observing them. And all the people shall say, ‘Amen!’”
Then Deuteronomy 28 gives us the blessings and the curses. (I won't list them here.) In Galatians, Paul was saying that if you rely on the law for your salvation, then you are also subject to the curses of the law for breaking it. But again, it does not mean that observing the law is bad nor wrong. One can observe the law without relying on the law for salvation. The curse of the law has been removed, but it does not mean that man now has free license to disobey the law.
To answer your question, no, it is not a light matter to bring a curse upon oneself from God. But following the law does not bring the curse. I think it is clear in Paul's own actions when he had Timothy circumcised in accordance with the law, that following it is not what brings the curse. It is the reliance on the law for salvation, rather than faith, that then subjects man to the law and all the curses that go along with breaking it. The law is not bad, and choosing to observe the law out of love for God will not bring disfavor with God.