The spirit of the gospel is optimistic; it trusts in God and looks on the bright side of things. The opposite or pessimistic spirit drags men down and away from God, looks on the dark side, murmurs, complains, and is slow to yield obedience. ↗
Seeing the glass as half empty is more positive than seeing it as half full. Through such a lens the only choice is to pour more. That is righteous pessimism. ↗