Ps 50:21
21 These things hast thou done, and I kept silence; thou thoughtest that I was altogether such an one as thyself: but I will reprove thee, and set them in order before thine eyes.
Evil men, with corrupt minds, do blaspheme God, and think of God as one like himself, when in our thinking, they join what God has seperated in point and time, and that more specifically being His Eternal Justification of the Elect in His own Mind in Christ, due to His own innate Purpose within Himself, and then the declaring the Elect Justified in their own conscience in time. This is an willful confounding of Eternity with time, the Eternal with the temporal, the Creator with the creature.
For God in His Own Eternal Purpose, He did act immanently, Justifying the Elect in Christ within His Own Counsel from Everlasting, so from Everlasting He is their God Ps 90:1-2
Lord, thou hast been our dwelling place in all generations.
Before the mountains were brought forth, or ever thou hadst formed the earth and the world, even from everlasting to everlasting, thou art God[In Covenant].
Thats why it is written of His Mercy Ps 103:17
17 But the mercy of the Lord is from everlasting to everlasting upon them that fear him, and his righteousness unto children's children;
But this is different and opposed to when He would Justify them in their own persons and hearts in time.
If God does not in His own Mind consider the Elect Justified from Eternity by His Own immanent act, but not until the Elect in their own mind in time are Justified by God given Faith [The Faith of God's Elect Titus 1:1-2], then this would speak of an mutability in God, a Change from what His Mind was in Eternity towards His Elect, which would make God out to be as one of His creatures, and Eternity is governed by time. This is Blasphemy against God, and unless repentance is granted , those teaching such and believing such shall not go unpunished in Hell !
And everyone who disbelieves in the Eternal Justification of God's Elect are in serious peril of damnation !