John Calvin on Matthew 20:31

31. And the multitude reproved them. It is surprising that the disciples of Christ, who follow him through a sense of duty and of respect, should wish to drive wretched men from the favor of Christ, and, so far as lies in them, to prevent the exercise of his power. But it frequently happens that the greater part of those who profess the name of Christ, instead of inviting us to him, rather hinder or delay our approach. If Satan endeavored to throw obstacles in the way of two blind men, by means of pious and simple persons, who were induced by some sentiments of religion to follow Christ, how much more will he succeed in accomplishing it by means of hypocrites and traitors, if we be not strictly on our guard. Perseverance is therefore necessary to overcome every difficulty, and the more numerous the obstacles are which Satan throws in the way, the more powerfully ought we to be excited to earnestness in prayer, as we see that the blind men redoubled their cry