For with thee is the fountain of life: in thy light shall we see light. (Psalm 36:9)
For with (you, O Lord) is the fountain (Heb: mâqôr – something dug, source, wellspring) of life (Heb: chay – raw, fresh, alive; life): in thy light (Heb: ‘ôr – illumination) we shall see light.
With thee, O Lord, is the wellspring, or source, of all life; in thy illuminating presence shall we perceive, or experience, light.
Recall: In him was life; and the life was the light of men. (John 1:4) Our lives are an offspring of God’s light; we are ever grateful to the Lord for His graceful illumination of our lives.
The light that we see is actually the embodiment of God. God is love, God is life, and God is light.
It is because God created light that we now have life. It is God’s Word that gives us life; thus God’s Word (Jesus Christ as reflected in Scripture and in Life itself) is our light. We can perceive the physical reality of light just by very nature of seeing, and we can similarly perceive the spiritual reality of Christ by very nature of knowing.