Acts 16:24

God, in times past, caused people to be kept subject to His law so they would learn the more excellent way of faith. For it was through the law that they would see God’s holy standard and thereby realize their own utter helplessness. Then they would gladly learn His way of faith.

God still causes us to be “locked up until faith” is learned. Our own nature, circumstances, trials, and disappointments all serve to keep us submissive and “locked up” until we see that the only way out is His way of faith. Moses attempted the deliverance of his people by using self-effort, his personal influence, and even violence. So God “locked [him] up” for forty years in the wilderness before he was prepared for His work.