In his book “Experiencing God: Knowing and Understanding the Will of God,” Henry Blackaby writes:
"Will God ever ask you to do something you are not able to do? The answer is yes—all the time! It must be that way, for God's glory and kingdom… [And] when God tells you what He wants to do, you will face a “crisis of belief.”
Whenever God calls us to one of our divine assignments, we will face resistance—from within and without. At such a point in his ministry, Paul said “for a wide door for effective service has opened to me, and there are many adversaries” (1 Cor. 16:9 NASB). Sometimes the voice of the ‘adversary’—the opposition—is not only the voices of others, but the voice of doubt and fear within us.
As anyone who has walked with Jesus for any length of time knows, we will face obstacles at every turn. But these obstacles—adversaries, opponents—are necessary to prove our faith (James 1:3). As the Israelites journeyed through the Wilderness to cross the Jordan into the Promised Land, many adversaries told them not to go. And unfortunately, at the moment of their “crisis of belief”—the test of faith—they failed. What crisis of faith are you facing right now? Is God calling you to do something you think you are not able to do? At the moment of his "crisis," Paul said, “Watch, stand fast in the faith, be brave, be strong” (1 Cor. 16:13 NKJ).