God doesn't promise to always make sense, but He promises we can always trust Him.
Exodus 16:19-20 offers an interesting illustration of this truth when Moses gave God's clear instructions about manna:
"Then Moses said to them, 'No one is to keep any [manna] until morning.'"
"However, some of them paid no attention to Moses; they kept part of it until morning, but it was full of maggots and began to smell."
Keeping that manna made sense to some of the Israelites. Perhaps they thought it was less wasteful.*
But they didn't realize that God was using manna collection to teach them that "man does not live on bread alone but on every word that comes from the mouth of the Lord." (See Deuteronomy 8:3)
God wanted them to depend on Him daily. Jesus repeated that truth in Matthew 4:4, and it's worth repeating here: "Man shall not live by bread alone but by every word that comes from the mouth of God."
Have you collected your manna today?
*It's intereting to note that the manna could be saved and stored overnight without problems for the Sabbath, proving that the rule was given to teach daily dependence. Exodus 16:21-30