Why is being preserved by God important for Christians?

The doctrine of preservation, as illustrated in Psalm 121, reassures Christians of God's continual grace safeguarding them throughout their lives. This preservation is essential because it reflects God's active role in preventing His people from falling away and assures them of their eternal security in Christ. The psalmist's affirmation that God watches over our going out and coming in emphasizes that every aspect of our lives is under His sovereign care. The reality of being kept by God combats despair and strengthens our hope, leading us to rest in His promises amidst life's uncertainties.