Question: A website claims ADHD and all mental illness are caused by sin or the devil

Mike calls this view silly and identifies two extremes to avoid: (1) Everything is sin/demonic; (2) Everything is a chemical imbalance with no moral dimension. He rejects both. As a Christian he has both explanations available and applies them case by case. He also notes the possibility that both are simultaneously true — chemicals and sin can reinforce each other bidirectionally.