Charles H. Spurgeon on Psalms 36:9

In thy light shall we see light. The object and matter of our eternal happiness is called light. It will not be a dazzling and confounding light as was the brightness of Moses' face at his coming down from the mount; the people could not behold him: it will not be an astonishing light, as that in the mount at our Lord's transfiguration; the disciples fell to the ground, their weak eyes could not behold those glimpses of glory that shined through the vail of flesh. But the light in our heaven of happiness will be a strengthening and comforting light; it will strengthen and confirm the eyes of our understanding to behold it. Then shall we be enabled as the young eagles, to behold the Sun of Righteousness in his brightness and glory. It was said by the Lord to Moses, "None can see my face and live." Ex 33:20. That glorious sight which Daniel saw took strength from him. Da 10:8. The object being without him, drew out all his spirits to behold and admire it and so weakened him; but in heaven our God, whom we shall see and know, will be within us to strengthen us; then shall we live because we see his face. It will be also a comforting light, like the light of the morning to the wearied watchman, who longed after it in the nighttime. William Colville.