Genuine repentance or the dying-away of the old self is to run away from sin according to Lord’s Day 33. Wicked enemies of David were preparing to attack his armies, and his advisors were saying to him that he should run to his mountain, presumably Jerusalem (Mount Zion). They know what they are talking about. The danger is immense! There he will be save. Please, king David listen to our advice and flee to the mountains! King David gives a different answer and a short answer: “In the LORD I take refuge; how can you say to my soul, “Flee like a bird to your mountain?” Faith is to flee away from sin in deep repentance and flee to the Lord. Flee to the Lord in earnest prayer, run to His Word that comforts, and is profitable for teaching, reproof, correction, and for training in righteousness. Flee from the wickedness of the world, flee from sin, flee from anger, flee from hate, and never let our prophetic voice as a church be silent!

[Heidelberg Catechism Lord’s Day 33 Q/A 89]