How do we know God is light?

The concept of God being light is foundational in Scripture, representing His holiness and truth. In 1 John 1:5, it states, 'God is light, and in Him is no darkness at all,' signifying that God’s essential nature is devoid of sin and encompasses all that is true and good. This light metaphor is not only foundational but serves as a guide for believers, reflecting that when we walk in the light, we are aligned with God's truth and righteousness. The revelation of God’s character as light offers assurance of His presence and guidance in the darkest times of life.