" James intentionally enlarges the scope of suffering when he writes, “trials of many kinds.” By doing this, he invites those who experience depression to learn that, whatever the cause, depression will test our faith and serve as a catalyst for growth rather than a reason for despair. Yes, depression is spiritual in the same way that all suffering brings us face-to-face with critical spiritual realities. "

― Edward T. Welch , Depression: A Stubborn Darkness–Light for the Path