“I will give you treasures hidden in the darkness–secret riches. I will do this so you may know that I am the LORD, the God of Israel, the one who calls you by name.” (Isaiah 45:3)
One of the treasures of darkness is faith. “Now faith is confidence in what we hope for and assurance about what we do not see.” Hebrews 11:1) When we walk in faith, we walk in darkness, so that we might know the One who calls us by name.