Although I can clearly see its Biblical precedent, it seems to be a
question that was not explicitly addressed until the Reformation.
This "doctrine of self glorification" can actually be found in the earliest Judaic writings:
"I have fashioned this nation for Myself, they will relate my praise" (Isaiah 43:21)
"You are my servant, O Israel, through whom I will be glorified" (Isaiah 49:3)
The majority of Biblical scholars believe that the written books of the Torah were a product of the Babylonian captivity (c. 6th century BCE), based on earlier written sources and oral traditions, and that it was completed with final revisions during the post-Exilic period (c. 5th century BCE). The Hebrew religion out of which Judaism evolved, was polytheistic, becoming officially monolatrous during the late monarchy and monotheistic around the time of the Babylonian Exile.
This means that many of the oldest Torah texts were first written or finalized during the transition from polytheism to monotheism. Many echoes of the "struggle for supremacy" between these (usually city) deities can be found in the OT.
According to the available evidence, Israelite religion in its earliest form did not contrast markedly with the religions of its Levantine neighbours in either number or configuration of deities (See Mark S. Smith: The Early History of God). At some stage Yahweh joined the Israelite pantheon, possibly from Midian, where Egyptian records show that a god called YHW was worshipped. "Self-glorification" as witnessed in the texts of the OT is an obvious way to make Yahweh the top deity.
Yahweh (YHWH) was worshipped during the early, polytheistic centuries of Israel and Judah, although it is thought that Yahweh only entered Hebrew belief some time after the people became established as identifiable groups. So, Yahweh clearly was a polytheistic deity. The Canaanite father of the gods was El (Hebrew: Elohim), but Yahweh became the national god and then syncretised with El as one supreme God above all others. Evidence of this syncretization is easily found in the OT:
Many verses take on a completely different meaning if you know of the polytheistic origin of Judaism:
Thou shalt have no other gods before me (Exodus 20:3)
Thou shalt not bow down thyself to them, nor serve them: for I the Lord thy God am a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth generation of them that hate me; (Exodus 20:5)
Clearly these self-glorifying statements make more sense in a polytheistic context before Yahweh became the state deity.
One of the titles that Yahweh calls himself, "El Shaddai" (usually translated as the almighty) takes on a very different meaning in the aforementioned Midian origin of Yahweh:
The biblical account describes the Midianites as worshiping more than one deity, including both Baal-peor and Yahweh. Both of these deities are likewise described as being worshiped by the Israelites themselves, although Baal worship was supposedly forbidden to them. Scholars speculate that the worship of Yahweh may have actually begun among the Midianites and was later adapted by the Israelites. Supporting this theory is the fact that Exodus states that God was known as as El-Shaddai by the Israelites until Moses' encounter with Him at Sinai, after first meeting the Midianite priest Jethro and marrying into his family:
Moses’ father-in-law replied, “What you are doing is not good. 18 You
and these people who come to you will only wear yourselves out. The
work is too heavy for you; you cannot handle it alone. 19 Listen now
to me and I will give you some advice, and may God be with you. You
must be the people’s representative before God and bring their
disputes to him. 20 Teach them his decrees and instructions, and show
them the way they are to live and how they are to behave. (Exodus 18)
After this event we get Mozes' encounter, where Yahweh states:
In conclusion, not only does self-glorification clearly predate the Reformation, but its origin is very likely strategical writing to ultimately establish an imported Yahweh as the state deity and to syncretize this deity with Elohim.