Ruta graveolens the isolation of the furanocoumarin chalepensin. The essential oil of "R. graveolens" contains two main constituents, undecan-2-one (46.8%) and nonan-2-one (18.8%). The bitter taste of its leaves led to rue being associated with the (etymologically unrelated) verb "rue" "to regret". Rue is well known for its symbolic meaning of regret and it has sometimes been called "herb-of-grace" in literary works. It is one of the flowers distributed by the mad Ophelia in William Shakespeare's "Hamlet" (IV.5): It was planted by the gardener in "Richard II" to mark the spot where the Queen wept upon hearing news of Richard's capture (III.4.104–105):
Grace in Christianity affirms: According to a commonly accepted categorization, made by St. Thomas Aquinas in his "Summa Theologiae", grace can be given either to make the person receiving it pleasing to God ("gratia gratum faciens")—so that the person is sanctified and justified—or else to help the receiver lead someone else to God ("gratia gratis data"). The former type of grace, "gratia gratum faciens", in turn, can be described as sanctifying (or habitual) grace—when it refers to the divine life which, according to the Church, infuses a person's soul once he is justified; or else as actual grace—when it refers to those punctual