Jamieson, Fausset and Brown on Ezekiel 1:28

28. the bow ... in ... rain--the symbol of the sure covenant of mercy to God's children remembered amidst judgments on the wicked; as in the flood in Noah's days (Re 4:3). "Like hanging out from the throne of the Eternal a fing of peace, assuring all that the purpose of Heaven was to preserve rather than to destroy. Even if the divine work should require a deluge of wrath, still the faithfulness of God would only shine forth the more brightly at last to the children of promise, in consequence of the tribulations needed to prepare for the ultimate good" [Fairbairn]. (Is 54:8-10).

I fell upon ... face--the right attitude, spiritually, before we enter on any active work for God (Eze 2:2; 3:23, 24; Re 1:17). In this first chapter God gathered into one vision the substance of all that was to occupy the prophetic agency of Ezekiel; as was done afterwards in the opening vision of the Revelation of Saint John.