Charles H. Spurgeon on Psalms 36:9

For with thee is the fountain of life. This verse is made of simple words, but like the first chapter of John's Gospel, it is very deep. From the Lord, as from an independent self sufficient spring, all creature life proceeds, by him is sustained, through him alone can it be perfected. Life is in the creature, but the fountain of it is only in the Creator. Of spiritual life, this is true in the most emphatic sense; "it is the Spirit that quickeneth, ""and we are dead, and our life is hid with Christ in God." In thy light shall we see light. Light is the glory of life. Life in the dark is misery, and rather death than life. The Lord alone can give natural, intellectual, and spiritual life; he alone can make life bright and lustrous. In spiritual things the knowledge of God sheds a light on all other subjects. We need no candle to see the sun, we see it by its own radiance, and then see everything else by the same lustre. We never see Jesus by the light of self, but self in the light of Jesus. No inward intelligence of ours leads us to receive the Spirit's light, but the rather, it often helps to quench the sacred beam; purely and only by his own illumination, the Holy Ghost lights up the dark recesses of our heart's ungodliness. Vain are they who look to learning and human wit, one ray from the throne of God is better than the noonday splendour of created wisdom. Lord, give me the sun, and let those who will delight in the wax candles of superstition and the phosphorescence of corrupt philosophy. Faith derives both light and life from God, and hence she neither dies nor darkens.