Proverbs 4:18-19

But the path of the just is as the shining light, that shineth more and more unto the perfect day. The way of the wicked is as darkness: they know not at what they stumble.

In these verses the contrast is finely drawn between the state of a justified soul in Christ, and the unawakened, unsanctified soul of the wicked. Jesus is both the light and the life of his people. And the progressive state of souls justified in his blood and righteousness, is like the advance of the morning to meridian brightness. But on the contrary, the darkness at which the ungodly stumble is growing to more and more darkness, where even the light is darkness. Job 10:22.