Summum bonum (Latin for the highest goo) is an expression used in philosophy, particularly in medieval philosophy, to describe the ultimate importance, the singular and most ultimate end which human beings ought to pursue. The summum bonum is generally thought of as being an end in itself, and at the same time containing all other goods. In Christian philosophy, the highest good is usually defined as the life of the righteous, the life led in Communion with God and according to God's precepts.