A Difficulty Resolved in Practice

"Another wants to know how it is that men are bidden to come,—and yet we are taught in Scripture that no man can come,—and he must have that cleared up; just as if the poor man who had a withered arm, when Christ said, "Stretch out thine arm," had replied, "Lord, I have got a difficulty in my mind; I want to know how you can tell me to stretch out my arm when it is withered." Suppose when Christ had said to Lazarus, "Come forth," Lazarus could have said, "I have a difficulty in my mind; how can a dead man come forth?" Why, know this, vain man! when Christ says "Stretch out thine arm," he gives you power to stretch out your arm with the command, and the difficulty is solved in practice; though I believe it never will be solved in theory."
Charles Spurgeon, An Appeal to Sinners 

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Listen to it.
Watch... well not you still can only listen, but you can look at the pictures.