C.H. Mackintosh on gathering manna (Exodus 16, cf John 6)
If an Israelite neglected to gather, in the freshness of the morning hour, his daily portion of the divinely appointed food, he would speedily have become lacking in strength for his journey. Thus is it with us. We must make Christ the paramount object of our souls' pursuit, else our spiritual life will inevitably decline. We cannot even feed upon feelings and experiences connected with Christ, for they, inasmuch as they are fluctuating, cannot form our spiritual nourishment. It was Christ yesterday, and it must be Christ today, and Christ forever.
Mackintosh, Notes on the Book of Exodus, 216-17.