Elijah ran from Jezebel after his greatest spiritual victory, sat under a tree, and asked God to let him die. He wasn't questioning theology. He was depleted, afraid, and in despair. God's response is one of the most instructive passages in the Old Testament for mental health: he sent an angel to touch Elijah, give him food and water, let him sleep, and tell him to rest — twice — before giving him any instruction at all. God addressed the body before he addressed the mission. He did not rebuke the prophet for his despair. He fed him.
The Psalms are the most emotionally honest literature in Scripture. David describes being "poured out like water," his bones "out of joint," his heart "like wax" (Psalm 22). He uses the language of physical dissolution to describe inner anguish. The church has sometimes treated mental and emotional suffering as a spiritual failure — a sign of insufficient faith or unconfessed sin. The Psalms refuse that framing. They make space for lament, confusion, terror, and exhaustion as legitimate prayers.
Philippians 4:7 describes "the peace of God, which passeth all understanding." The word for 'passeth' is hyperechousa — surpassing, exceeding, going beyond. This is not peace that requires you to understand your situation. It's peace that exceeds your ability to comprehend what's happening to you. That's important, because mental suffering often comes precisely from the inability to understand or explain what you're experiencing. God's peace isn't contingent on clarity.
Commentary is from a charismatic Protestant perspective, drawing on KJV text and public-domain sources including Spurgeon, Andrew Murray, and Matthew Henry.