Isaiah 58:1

“Cry aloud, spare not, lift up thy voice like a trumpet, &c.] These words are directed to the prophet; and so the Targum expresses it, “O prophet, cry with thy throat;” and so it is in the original, “cry with the throat”f1142, which is an instrument of speech; and it denotes a loud, strong, vehement cry, when a man exerts his voice, and as it were rends his throat, that he may be heard; as well as it shows the intenseness of his spirit, and the vehemence of his affections, and the importance of what he delivers; and this the prophet is encouraged to do, and “spare not”, the voice, throat, or his lungs, nor the people neither he was sent unto; or, “cease not”, as the Targum, refrain not from…”

“REPROOF OF THE JEWS FOR THEIR DEPENDENCE ON MERE OUTWARD FORMS OF WORSHIP. (Isa 58:1-14) aloud--Hebrew, "with the throat," that is, with full voice, not merely from the lips (Sa1 1:13). Speak loud enough to arrest attention. my people--the Jews in Isaiah's time, and again in the time of our Lord, more zealous for externals than for inward holiness. ROSENMULLER thinks the reference to be to the Jews in the captivity practising their rites to gain God's favor and a release; and that hence, sacrifices are not mentioned, but only fasting and Sabbath observance, which they could keep though far away from the temple in Jerusalem. The same also applies to their present dispersion, in which they…”

“Cry aloud - Margin, ‘With the throat;’ that is, says Gesenius, with open throat, with full voice coming from the throat and breast; while one who speaks low uses only the lips and tongue 1 Samuel 1:13. The Chaldee here introduces the word prophet, ‘O prophet, cry aloud.’ The Septuagint renders it, ‘Cry with strength.’ (ἐν ἰσχύΐ en ischui). Spare not - That is, do not spare, or restrain the voice. Let it be full, loud, and strong. Lift up thy voice like a trumpet - Speak loud and distinct, so that the language of reproof may be heard. The sense is, the people are insensible and stupid. They need something to rouse them to a sense of their guilt. Go and proclaim it so that all may hear.…”

“58:1-4 This is a charge against religious Israelites who were pleased with themselves because of their religious activities.”

“aloud: Heb. with the throat spare: Isa 56:10; Psa 40:9, Psa 40:10; Jer 1:7-10, Jer 1:17-19, Jer 7:8-11, Jer 15:19, Jer 15:20; Eze 2:3-8; Eze 3:5-9, Eze 3:17-21, Eze 20:4, Eze 22:2; Mic 3:8-12; Mat 3:7-9; Act 7:51, Act 7:52; Act 20:26, Act 20:27; Tit 2:15; Rev 14:9, Rev 14:10 lift up: Isa 40:9, Isa 40:10 like: Isa 27:13; Hos 8:1; Rev 1:10, Rev 4:1 Isaiah 58:2”

“As the last prophecy of the second book contained all the three elements of prophetic addresses - reproach, threat, and promise - so this, the first prophecy of the third book, cannot open in any other way than with a rehearsal of one of these. The prophet receives the commission to appear as the preacher of condemnation; and whilst Jehovah is giving the reason for this commission, the preaching itself commences. "Cry with full throat, hold not back; lift up thy voice like a bugle, and proclaim to my people their apostasy, and to the house of Jacob their sins. And they seek me day by day, and desire to learn my ways, like a nation which has done righteousness, and has not forsaken the right…”