Gentleness

"Truth must be always charitable; for bitter zeal does harm instead of good. Reprehensions are a food of hard digestion, and ought to be dressed on a fire of burning charity so well, that all harshness be taken off; otherwise, like unripe fruit, they will only produce gripings. Charity seeks not itself nor its own interests, but purely the honor and interest of God: pride, vanity, and passion cause bitterness and harshness: a remedy injudiciously applied may be a poison. A judicious silence is always better than a truth spoken without charity."

-- St. Francis of Sales