If life is dark for you, trust in the Lord and rely upon the God who created you (Isaiah 50.10), but for those who walk in their own light, not trusting in the Lord and not relying upon God, He says,

“Look, all you who kindle a fire,
Who encircle yourselves with sparks:
Walk in the light of your fire and in the sparks you have kindled—
This you shall have from My hand:
You shall lie down in torment.”
(Isaiah 50.11)

I know that the world says light for living comes from inside you, but your Creator says we need the light that comes from Him.