Origen

There were then many masters of this colt, before that the Saviour had need of him. But as soon as He began to be the master, there ceased to be any other. For no one can serve God and mammon. (Matt. 6:24.) When we are the servants of wickedness we are subject to many vices and passions, but the Lord has need of the colt, because He would have us loosed from the chain of our sins.