20 And all the congregation of the children of Israel departed from the presence of Moses.

21 And they came, every one whose heart stirred him up, and every one whom his spirit made willing, and they brought the Lord’s offering to the work of the tabernacle of the congregation, and for all his service, and for the holy garments.

Now it was time for each individual Israelite to examine his situation and desire. Surely not all had enough to offer to the tabernacle. Surely some, too, could give but simply did not want to. They had no obligation to. The Lord had only asked for those who had the means and a willing heart, so this would be entirely voluntary or not at all.

But what if not enough people chose to make offerings and they couldn’t build the tabernacle? God’s plans depended on the willful involvement of these people, and they could very well let Him down. This is but one example in the scriptures of how God puts trust in mortal people, fallen as we are. In fact, God’s entire enterprise with the Earth, His plan to assimilate it into the Kingdom of Heaven, is dependent upon there being souls down here that are willing conduits for His work.

Of course, God does not require our help to persist as the Supreme Being of the universe. If we all abandoned Him, He would still be who He is, but He and we would exist in isolation from one another until we went extinct. But if, instead, there is to be an overlap of heaven and earth, it is going to require willful effort on both sides, and so God trusts in the good of people and we trust in the good of Him.