Because God that is immutable changes what He willed, He is said to repent, although what changes is a thing and not His counsel.
Pope Gregory IThere are in truth three states of the converted: the beginning, the middle, and the perfection. In the beginning they experience the charms of sweetness; in the middle the contests of temptation; and in the end the fullness of perfection.
Pope Gregory IHave confidence in the compassion of our Creator. Reflect well on what you are now doing, and keep before you the things you have done. Lift up your eyes to the overflowing compassion of heaven, and while He waits for you, draw near in tears to our merciful Judge. Having before your mind that He is a Just Judge, do not take your sins lightly; and having also in mind that He is compassionate, do not despair. The God-Man gives man confidence before God.
Pope Gregory I