He [Satan] had proudly boasted to the heavenly angels that when Christ should appear, taking man's nature, He would be weaker than himself, and he would overcome Him by his power. He exulted that Adam and Eve in Eden could not resist his insinuations when he appealed to their appetite.—The Review and Herald, July 28, 1874. TA 155.2
The only begotten Son of God came to our world as a man, to reveal to the world that men could keep the law of God. Satan, the fallen angel, had declared that no man could keep the law of God after the disobedience of Adam.—Manuscript Releases 6:334. TA 155.3
Satan claimed that it was impossible for human beings to keep God's law. In order to prove the falsity of this claim, Christ left His high command, took upon Himself the nature of man, and came to the earth to stand at the head of the fallen race, in order to show that humanity could withstand the temptations of Satan.—The Upward Look, 172. TA 155.4