"same old, lifeless prayers over and over; they preach the same dry discourses from week to week and from month to month. They have nothing new and inspiring to present to their congregations, and this is evidence that they are not partakers of the divine nature. Christ is not abiding in the heart by faith. GW 437.1"
"Whereby are given unto us exceeding great and precious promises: that by these ye might be partakers of the divine nature, having escaped the corruption that is in the world through lust."
The EGW passage speaks of lifeless prayers and dry discourses as evidence of not partaking in the divine nature. The 2 Peter verse directly states that believers are partakers of the divine nature.
"Those who claim to keep and teach the holy law of God, and yet are continually transgressing that law, are stumbling-blocks both to sinners and to believers in the truth. The loose, lax way in which many regard the law of Jehovah and the gift of His Son, is an insult to God. The only way in which we can correct this wide-spread evil, is to examine closely every one who would become a teacher of the Word. Those upon whom this responsibility rests, should acquaint themselves with his history since he professed to believe the truth. His Christian experience and his knowledge of the Scriptures, the way in which he holds present truth, should all be understood. No one should be accepted as a laborer in the cause of God, until he makes it manifest that he has a real, living experience in the things of God. GW 437.2"
"All therefore whatsoever they bid you observe, that observe and do; but do not ye after their works: for they say, and do not."
The EGW passage warns against those who teach the law but transgress it, becoming stumbling blocks. This directly echoes Jesus's warning in Matthew 23:3 about the Pharisees who say and do not.