Luk 16:29-31 Abraham saith unto him, They have Moses and the prophets; let them hear them. And he said, Nay, father Abraham: but if one went unto them from the dead, they will repent. And he said unto him, If they hear not Moses and the prophets, neither will they be persuaded, though one rose from the dead.
Although that conversation was ostensibly about being generous and kind, it was also a roundabout reference to eternal salvation and the resurrection of the Messiah. Through this parable, Yeshua was hinting that those who reject the testimony of Moses will also reject the Messiah and his testimony.
Joh 5:42-47 But I know you, that ye have not the love of God in you. I am come in my Father’s name, and ye receive me not: if another shall come in his own name, him ye will receive. How can ye believe, which receive honour one of another, and seek not the honour that cometh from God only? Do not think that I will accuse you to the Father: there is one that accuseth you, even Moses, in whom ye trust. For had ye believed Moses, ye would have believed me: for he wrote of me. But if ye believe not his writings, how shall ye believe my words?
Yeshua was accusing the Jewish elite of not having the love of God, and he referred them to the writings of Moses (the Torah) as evidence. They were trusting in the Torah for their salvation, but they never obeyed (John 7:19) or even believed what was in it. The spirit of the Law is love of God and mankind, and its primary aim is the redemption of mankind by the Messiah as the ultimate embodiment of that love. Therefore, if your life is in line with the Torah, then you are aiming at the Messiah. The converse is also true. If your life is not in line with the Torah, then you are not aiming at the Messiah.
Paul, or someone very like him, wrote:
Heb 10:28-29 He that despised [does away with, sets aside, disregards, nullifies, rejects, refuses -Thayer’s Greek Definitions] Moses’ law died without mercy under two or three witnesses: Of how much sorer punishment, suppose ye, shall he be thought worthy, who hath trodden under foot the Son of God, and hath counted the blood of the covenant, wherewith he was sanctified, an unholy thing, and hath done despite unto the Spirit of grace?
In other words, if anyone who rejects the Torah deserves to die without mercy, how much more does anyone who rejects the sacrifice of Yeshua deserve to die? This is a light and heavy argument which requires that the first premise be true before the second can be true. If rejection of the Torah does not call for death, then the second premise is meaningless. Zero multiplied by anything is still zero.
I’m not saying you have to obey–or even try to obey–the Torah to be saved. I’m saying that it’s very difficult to hit a target if you don’t know what it looks like. I’m also saying that if you really are aiming at the right target, Yeshua, then you are already obeying Torah, and your life will show it.