19 And Moses said, Let no man leave of it till the morning.

20 Notwithstanding they hearkened not unto Moses; but some of them left of it until the morning, and it bred worms, and stank: and Moses was wroth with them.

21 And they gathered it every morning, every man according to his eating: and when the sun waxed hot, it melted.

God gave a second piece of instruction, that the people were not to gather excess and store it for the next day. Every day a person would receive exactly what they needed, and no more, and the next day they would trust God to provide for them again. But some of the people did not listen. They did gather extra, they retained it through the night, and the next morning it was filled with worms and rotten.

Once again, the symbolism is clear. God had arranged this situation to teach a lesson that the people were to live by His grace alone. Going to bed every night and rising every morning would be an act of faith, trusting that there would be manna waiting for them each time. If there wasn’t…things would be very bad for them, but they would learn that they could count on God providing what they needed each day.

This, of course, goes directly against the instinct to provide for oneself. Rather than trust on the Lord tomorrow, some of the Israelites would rather have relied on their efforts the day before. They saw an opportunity to go beyond their mandate and build their own security. We also do this when we are distracted from God by our own strategies for happiness and security. The result for us, as it was for the Israelites, was rot and waste. All of our Godless goods became food for the worm. As a general rule for life, stale excess sooner or later summons the devourers.

Jesus spoke on this very matter in Luke 12. He warned against those who took too much thought for their gain when he recounted the parable of a rich man whose fields produced an excessive abundance, and who spent his time planning out the grand, new barns he would build to hold the surplus. Said the man, “And I will say to my soul, Soul, thou hast much goods laid up for many years; take thine ease, eat, drink, and be merry. But God said unto him, Thou fool, this night thy soul shall be required of thee: then whose shall those things be, which thou hast provided?” (Luke 12:19-20).

It is better to live moment-to-moment by God’s grace than to pave a road of our own design. For God’s grace cannot be thwarted, but all our designs will be.