Charles Ellicott Commentary Proverbs 4:19

"The way of the wicked is as darkness: They know not at what they stumble." — Proverbs 4:19 (ASV)

The way of the wicked is as darkness.—By refusing to walk in the light of God’s Word, and conscience (1 John 1:7), the light that was in them has become darkness (Matthew 6:23); they know not where they are going (John 12:35), and stumble (Proverbs 11:10) over difficulties which in the light they might have avoided.