21. Because that, when they knew God--that is, while still retaining
some real knowledge of Him, and ere they sank down into the state next
to be described.
they glorified him not as God, neither were thankful--neither
yielded the adoration due to Himself, nor rendered the gratitude which His beneficence demanded.
but became vain--(compare
Jer 2:5).
in their imaginations--thoughts, notions, speculations, regarding
God; compare
Mt 15:19;
Lu 2:35;
1Co 3:20,
Greek.
and their foolish--"senseless," "stupid."
heart--that is, their whole inner man.
was darkened--How instructively is the downward progress of the human
soul here traced!
JFB.
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