Given both halves of the Lorenzo Snow couplet:

“As man now is, God once was.
As God now is, man may be.”

(a) If we will forever be dependent on and subordinate to our God, then it stands to reason that God himself remains dependent on and subordinate to his own God (our Heavenly Grandfather).

(b) If God is no longer dependent on and subordinate to his own God, then it stands to reason that we can someday become Gods who are independent of, and no longer subordinate to, our own God.

Yet the theistic conscience wants to affirm that both:

(c) God is independent of, and not subordinate to, any other Gods.

(d) We will forever remain dependent on, and subordinate to, our God.

With Biblical Christianity, (c) and (d) are compatible. With traditional Mormonism, they are incompatible.