Give glory to the LORD your God, before he cause darkness, and before your feet stumble upon the dark mountains, and, while ye look for light, he turn it into the shadow of death, and make it gross darkness. Give glory to - God - Confess your sins and turn to him, that these sore evils may be averted.
While ye look for light - While ye expect prosperity, he turned it into the shadow of death - sent you adversity of the most distressing and ruinous kind.
Stumble upon the dark mountains - Before you meet with those great obstacles, which, having no light - no proper understanding in the matter, ye shall be utterly unable to surmount.