כִּ֚י הַֽאֻמְנָ֔ם יֵשֵׁ֧ב אֱלֹהִ֛ים אֶת־הָאָדָ֖ם עַל־הָאָ֑רֶץ הִ֠נֵּה שָׁמַ֜יִם וּשְׁמֵ֤י הַשָּׁמַ֙יִם֙ לֹ֣א יְכַלְכְּל֔וּךָ אַ֕ף כִּֽי־הַבַּ֥יִת הַזֶּ֖ה אֲשֶׁ֥ר בָּנִֽיתִי׃
But will God in very truth dwell with men on the earth? behold, heaven and the heaven of heavens cannot contain Thee; how much less this house which I have builded!
Read kabbalistic (mystical) interpretation of II Chronicles 6:18: and classical mystical sources.