God is not contained
Tanach prophecy: Stated in the Prophets or the Writings.Solomon opens his dedication by saying the heavens cannot contain God, let alone a house. Isaiah hears the angels call that the whole earth is full of God's glory.
שכינה
כִּי הַאֻמְנָם יֵשֵׁב אֱלֹהִים עַל־הָאָרֶץ הִנֵּה הַשָּׁמַיִם וּשְׁמֵי הַשָּׁמַיִם לֹא יְכַלְכְּלוּךָ אַף כִּי־הַבַּיִת הַזֶּה אֲשֶׁר בָּנִיתִי׃
But will God in very truth dwell on the earth? behold, heaven and the heaven of heavens cannot contain Thee; how much less this house that I have builded!
Solomon opens his dedication by saying the heavens cannot contain God, let alone a house. Isaiah hears the angels call that the whole earth is full of God's glory.
The Torah speaks of the place God chooses ‘to put His name there’, and of God dwelling among the people rather than inside a building.
Shechinah, from the Hebrew for ‘dwell’, is the rabbinic term for God's manifest Presence. The Mishnah uses it of a group studying Torah together: the Presence rests among them.
Ezekiel watches the Glory leave the First Temple before its destruction, and in his vision sees it return to the future House by the eastern gate.
If God is everywhere, why one place? Because people are not everywhere at once. A place gives a people somewhere to turn together, to bring what they have, and to be met.
The sun lights the whole world, yet one window can let its light into a room in a concentrated way. This is an analogy, not a statement about how God exists. It only suggests why presence everywhere and presence somewhere need not contradict each other.