I'm not a law-keeper, but I still haven't found a single piece of evidence -- in the Gospels -- that Jesus ever told us to stop keeping the Law. Should we rely solely on what Paul said?
A good question. And the true answer is a dispensational one.
Firstly, the 'ten commandments' and the rest of the Law were given to Israel, and the covenants (both old (Ex19) and new (Jer31) were with Israel - not gentiles. So as gentiles (assuming you are not Jewish), we are not and have never been 'under the Law'.
Exo 19:3-8 "And Moses went up to God, and Jehovah called to him out of the mountain, saying, You shall say to the house of Jacob, and tell the sons of Israel: You have seen what I did to the Egyptians, and I bore you on eagles' wings and brought you to Myself. And now if you will obey My voice indeed, and keep My covenant, then you shall be a peculiar treasure to Me above all the nations; for all the earth is Mine. And you shall be to Me a kingdom of priests and a holy nation. These are the words which you shall speak to the sons of Israel.
And Moses came and called for the elders of the people, and laid before their faces all these words which Jehovah commanded him. And all the people answered together and said, All that Jehovah has spoken we will do. And Moses returned the words of the people to Jehovah."
Jer 31:31 "Behold, the days come, says Jehovah, that I will cut a new covenant with the house of Israel, and with the house of Judah."
Mat 26:28 "For this is My blood of the new covenant,.."
In the gospels, Jesus came to the Jews. He observed the Law, and told others do observe the Law.
Joh 8:11 "..And Jesus said to her, Neither do I give judgment. Go, and sin no more."
Mar 1:44 "and He said to him, See that you say nothing to anyone. But go and show yourself to the priest, and offer those things which Moses commanded for your cleansing.."
What he didn't approve of was all the Pharisaic additions to the law - their 'traditions'. So, for example, when he picked food and ate on the sabbath, he wasn't breaking the law of Moses, only the added traditions.
After the gospels, during the Acts period, the disciples all continued to observe the law. The law was not abolished at that point. This is evidenced in Acts 15 where we have the big dispute over whether the gentiles needed to be circumcised. Clearly the Jewish believers must have been observing the law to even raise the issue. And what was the result? That the gentiles did NOT need to observe the law, and only to keep from being unceremonially clean - so that the Jews could continue to fellowship with them and themselves remain 'clean'.
Act 15:19-20 Therefore my judgment is that we do not trouble those who have turned to God from among the nations, but that we write to them that they should abstain from pollutions of idols, and from fornication, and from things strangled, and from blood.
Act 15:28-29 For it seemed good to the Holy Spirit and to us to lay on you no greater burden than these necessary things: that you abstain from meats offered to idols, and from blood, and from things strangled, and from fornication; from which, if you keep yourselves, you shall do well. Be prospered.
For the Jewish believers, if they were not themselves observing the law, then their testimony would be futile. They needed to keep observing the law so they could be faithful witnesses to their Jewish brothers and sisters.
It is only AFTER the end of Acts, when Israel has been set aside (Acts 28:25-28) that we read the law is abolished (through the cross, but not AT the cross), and to not observe sabbaths, feasts, new moons, etc.
Col_2:16 Therefore let no one judge you in food or in drink, or in respect of a feast, or of the new moon, or of the sabbaths.
I am not sure, but I suspect once Jesus returns, the millenial kingdom may again observe the law..
Jer 31:33 "..but this shall be the covenant that I will cut with the house of Israel: After those days, says Jehovah, I will put My Law in their inward parts, and write it in their hearts; and I will be their God, and they shall be My people.