The title "Satan" means "The Opposer", i.e. the one who opposes God. Satan earned that title by deceiving this world with lies, as recorded from Genesis to Revelation, e.g.
Gen. 3;
Isa. 14:12-17;
Matt. 13:1-9;
Mark 4:1-23;
Luke 4:1-13;
John 8:35-36 (KJV John 8:44-45);
Rev. 12:3-9. So while the Gospel may not specifically state "
Satan invented the lie that God's Law is done away with, and obedience is impossible", it does make it perfectly clear that Satan did in fact invent those lies, along with every other.
In fact, there would be no need for Christ to state the following, if everyone knew that God's Law is immutable, and will never go away:
Matthew 5:17-19
5:17
Think not that I am come to destroy The Law, or the Prophets: I am not come to destroy, but to fulfill [to fully preach The Law (The Torah) and fulfill the prophecies about the first coming of the Messiah].
5:18
For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no way pass from The Law, till ALL be fulfilled.
5:19
Whosoever therefore shall break one of these least COMMANDments, and shall teach men so, he shall be called the least in The Kingdom of heaven [the lowest of the low - like a serpent]: but whosoever shall do and teach [them], the same shall be called great in The Kingdom of heaven.
John 8:35-36 (KJV John 8:44-45)
8:35
Ye are of [YOUR] father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the Truth, because there is no Truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father (inventor) of it.
8:36
And because I tell [you] the Truth, ye believe me not.
Instead of believing the Truth that Christ plainly stated about The Law never passing away, many "Christians" have instead chosen to believe their misinterpretations of the letters of Paul, mistakenly believing the LIES that The National, Moral Law that God gave us -- found only in Genesis,
Exodus,
Leviticus,
Numbers and
Deuteronomy, which contains His Commandments, Statutes and Judgments -- has somehow gone away, so that we are no longer subject to it, nor will be judged by it (
Matt. 16:27). This is, of course, the exact opposite of what Christ teaches, which isn't Christ's personal doctrine, but is very obviously the doctrine of God, Who sent Christ to deliver it to us (
John 7:15-17).
John 7:15-20 (note well that the "Jews" called Jesus a liar/devil, for pointing out that they were NOT keeping The Law and were seeking to kill Jesus, which they eventually succeeded in doing, proving again that Christ, through the mouth of Jesus, was telling them the truth)
7:15 And the Jews marvelled, saying, How knoweth this man "Letters", having never been taught?
7:16 Jesus answered them, and said,
My doctrine is not mine, but His that sent me.
7:17
If any man will do His will, he shall know of the doctrine, whether it be of God, or [whether] I speak of myself.
7:18
He that speaketh of himself seeketh his own glory: but he that seeketh His glory that sent him, the same is true, and no unrighteousness is in him.
7:19
Did not Moses give you The Law, and [yet] NONE of you keepeth The Law? Why go ye about to kill me?
7:20 The people answered and said,
Thou hast a devil: who goeth about to kill thee?
And yes, returning to The Law that God gave us
IS the Gospel message that Christ brought. The very first words Christ-Jesus preached were warning everyone to
REPENT (stop sinning/breaking The Law), because Judgment Day IS coming, and people have forgotten that the punishments we suffer are the direct result of not keeping The Law.
Mark 1:14-15
1:14 Now after that John was put in prison, Jesus came into Galilee, preaching the gospel of "The KINGDOM" of God,
1:15 And saying,
The time is fulfilled, and "The KINGDOM" of God is at hand: repent ye, and believe the gospel.
The Gospel ("Glad Tidings/Good News" i.e. news from God, Who
IS Good) is very simple: despite all of our failings, despite all of our
PAST sins (
Rom. 3:25), despite our continued rebellion against God and His Law/Word, all we need to do is
REPENT, i.e.
STOP DOING EVIL (SINNING/BREAKING THE LAW).
This very simple message has been distorted by every single denomination/cult/sect of "Christianity" in varying degrees, including the followers of Ellen White. That is why Christ warned His People, who may still be mesmerized by "Christianity", to
COME OUT OF HER, to avoid receiving her plagues and punishment, which is coming
SOON (
Rev. 18:4).