the Lord - Jehovah, called “the angel of the Lord (Jehovah)” (Zec 1:12).
good words and comfortable words - literally, “words, consolations.” The subject of these consolatory words is stated in Zec 1:14, etc.; the promise of full re-establishment, Jer 29:10, Jer 29:11 (compare Isa 57:18; Hos 11:8).