Then: i.e. when Malachi had spoken thus unto them, at a time of such apostasy, show us what is possible and practicable in these like days and "perilous times" which are closing this present Dispensation.
feared = revered.
spake. As in Mal_3:13.
one to another. Each one with his friend.
and. Note the Figure of speech Polysyndeton, App-6.
hearkened, and heard. As He heard the groaning of Israel (Exo_2:23, Exo_2:24); Moses, without words (Exo_14:15); and Nehemiah (Neh_2:4); Hannah, without words (1Sa_1:13); Jeremiah, his breathing (Lam_3:55, Lam_3:56); Jonah, when dying (Jon_2:2); the disciples, their thoughts (Luk_24:15, Luk_24:38).
and a book of remembrance. Some codices, with Syriac, read "a record was written in a book of remembrance". remembrance. Reference to Pentateuch (Exo_28:29. Num_10:10, the same word). App-92.
thought. Precious comfort for those now who cannot speak. We can walk with God (like Enoch, in the darkest days), and think of Him with these God-reverers now, in these similar days.