God in the OT/YHWH was not always fully omniscient, and didn't start out that way. He's just as much a part of all of this determinism/time as much as we are right now currently, but who's true purpose is to allow God to be relational to us, and show us who God is, etc (along with Jesus Christ also, who also was not always fully omniscient/didn't start out that way 100%) (Hence that ones claims with being completely equal to YHWH, but not equal to this other One yet, etc) but all of this is also why things in the scripture are told to us from that perspective, etc, or the perspective of choice sometimes, etc. It is impossible for the One who is always fully omniscient to both relate to us or show himself to us without these others who are also locked into all of this determinism/time with us, etc, anyway, without these other ones, it is impossible for this other One to make himself known, and/or relate/show himself to us. It is the one and only limitation with this One's always knowing/predetermining all from the beginning, or making the universe/this reality this way, etc.
In no reality for any being anywhere is it possible to know a thing 100% and there be existing some other possibilities that aren't 100%, and the other one absolutely 0%. So in order for there to be any being anywhere who always knows absolutely everything 100%, all other possibilities have to be 100% absolutely 0%, otherwise full omniscience just isn't possible, etc. Therefore, in order for that to happen or be (there be any being anywhere who always knows everything 100% absolutely 100%) then this universe/reality has to be deterministic, with only one real pathway that this one can go ever, etc.
It's either this that I am right now telling you, or these God/Gods don't exist, or are made-up/invented by men like a lot of non-believers say, etc.
God Bless.
The claim that YHWH “was not always fully omniscient” contradicts the constant witness of Scripture and the dogmatic teaching of the Church. In the Old Testament God declares,
“I am God, and there is no other… declaring the end from the beginning” (Isa 46:9–10), which presupposes absolute and eternal omniscience, not a developing or time‑bound knowledge. God’s knowledge is not acquired, sequential, or reactive; He speaks through the prophet,
“Before ever a day came to be, all were written in your book” (Ps 139:16), and the Church teaches that God is
“eternal, immutable, incomprehensible, almighty” (Fourth Lateran Council, DS 800). Any theory that places God “inside” determinism or time denies His divinity, because
“with the Lord one day is as a thousand years and a thousand years as one day” (2 Pet 3:8), meaning He is not subject to temporal process at all.
Likewise, the suggestion that the Son “did not start out fully omniscient” is incompatible with the dogma of the Incarnation. Christ assumed a true human nature, including a human intellect, but the divine Person of the Son never ceased to possess the fullness of divine knowledge. The Catechism teaches that in His human soul Christ enjoyed the
“immediate knowledge of the Father” (CCC 473), and Scripture affirms His divine omniscience:
“Lord, you know all things” (Jn 21:17). When the Gospels speak of Christ “not knowing” the day or hour (Mk 13:32), Catholic tradition interprets this as referring to His human mode of knowing, not a limitation in His divine Person. To claim that Jesus is “not equal to the Other One yet” revives the Arian error condemned at Nicaea, which solemnly professes the Son to be
“true God from true God… consubstantial with the Father.”
Finally, the argument that omniscience requires a deterministic universe, or else God cannot relate to us is a philosophical assumption, not a biblical or Catholic truth. Scripture shows God freely entering covenantal relationship with creatures while eternally knowing all things:
“His understanding is infinite” (Ps 147:5), yet He genuinely invites human response,
“Choose life” (Deut 30:19). Catholic doctrine holds both divine providence and authentic human freedom without collapsing either into determinism (CCC 302–308). God does not need to limit His knowledge or create lesser “versions” of Himself to reveal Himself; He freely accommodates Himself to us through revelation and, supremely, through the Incarnation. The dilemma “either this is true or God is made‑up” is therefore false: the God of Scripture and the Church is eternally omniscient, sovereign, and yet personally relational in a way no creaturely model of knowledge can constrain.