Leviticus 25:18-22: in context

God gives Israel the law of the Sabbath year: every seventh year the land is to rest, no sowing, no reaping. Anticipating the obvious anxiety, God voices the question the people will ask: what shall we eat in the seventh year, if we do not plant or gather? And he answers it before they ask: I will command my blessing on you in the sixth year, and it will yield a crop enough for three years. You will sow in the eighth year and still be eating from the old harvest, right up until the ninth year's crop comes in.

The beautiful thing is that God addresses the fear before the people even raise it. He knows exactly the anxiety a command like this will produce, a whole year without planting, and he does not scold the worry; he answers it with a promise of provision that outruns the gap. The sixth year's harvest will be so abundant it carries them through three years, so that the year of rest is covered before it arrives. But notice the shape of the trust required: the blessing comes in the sixth year, before the seventh year of not sowing. They have to see the extra provision, and then still obey by not planting in the seventh; the promise is given ahead, but the obedience, letting the fields lie fallow, still takes faith. God provides in advance for the obedience he commands, but he still asks them to trust the provision enough to actually stop working the land. It is a picture of how God's commands and God's provision work together: he never commands a costly obedience without providing for it, but the provision often comes before the obedience, so that we must trust what he has already given enough to do the hard thing he asks. The sixth-year abundance was God's answer, in advance, to the seventh-year fear.

When God asks a costly obedience that stirs up my anxiety about provision, can I trust that he provides in advance for what he commands, as he gave the sixth-year harvest before the seventh-year rest?