Pseudo-Jerome

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For he must repent, who would keep close to eternal good, that is, to the kingdom of God. For he who would have the kernel, breaks the shell; the sweetness of the apple makes up for the bitterness of its root; the hope of gain makes the dangers of the sea pleasant; the hope of health takes away from the painfulness of medicine. They are able worthily to proclaim the preaching of Christ who have deserved to attain to the reward of forgiveness; and therefore after He has said, Repent, He subjoins, and believe the Gospel. For unless ye have believed, ye shall not understand.