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Job 23:16ESV·author unknown

God has made my heart faint; the Almighty has terrified me;

Matthew Henry Presbyterian @wholebiblehenry

Some make Job to complain here that God dealt unjustly and unfairly with him in proceeding to punish him without the least relenting or relaxation, though he had such incontestable evidences to produce of his innocency. I am loth to think holy Job would charge the holy God with iniquity; but his complaint is indeed bitter and peevish, and he reasons himself into a sort...

Commenting on Job 23:13-17

John Gill Reformed Baptist @doctorgill

Because I was not cut off before the darkness,.... That is, it was amazing to him, and troubled him when he thought of it, that he was not cut off by death, before the darkness of afflictions, or this dark dispensation came upon him; as sometimes righteous ones are taken from the evil to come, as Methuselah was before the flood, Gen 5:27; and Job...

Jamieson-Fausset-Brown Reformed @jfbcommentary

soft--faint; hath melted my courage. Here again Job's language is that of Jesus Christ (Psa 22:14).