Commentaries:
Jamieson, Fausset, and Brown
eateth—appropriately put for "liveth" in general, as connected with Ecclesiastes 5:11-12, Ecclesiastes 5:18.
darkness—opposed to "light (joy) of countenance" (Ecclesiastes 8:1; Proverbs 16:15).
wrath—fretfulness, literally, "His sorrow is much, and his infirmity (of body) and wrath."
Other Jamieson, Fausset, and Brown entries containing Ecclesiastes 5:17:
Ecclesiastes 3:22
Ecclesiastes 5:18
Ecclesiastes 8:14
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