Another temptation, to which presumption opens the gate, is acedia. the spiritual writers understand by this a form of depression due to lax ascetical practice, decreasing vigilance, carelessness of heart. "The spirit indeed is willing, but the flesh is weak."[21] The greater the height, the harder the fall. Painful as discouragement is, it is the reverse of presumption. the humble are not surprised by their distress; it leads them to trust more, to hold fast in constancy.