John Calvin on John 4:52

52. Therefore he inquired at them. That this courtier asked his servants at what time his son began to recover, was done by a secret impulse from God, that the truth of the miracle might be rendered more conspicuous. For by nature we have an exceedingly wicked disposition to extinguish the light of the power of God, and Satan labors, by various means, to hide the works of God from our view; and, therefore, in order that they may obtain from us that praise which is due to them, they must be made so manifest that no room is left for doubt. Whatever then may be the ingratitude of men, still this circumstance does not permit so illustrious a work of Christ to be ascribed to chance.