2. These graces, however, cannot be separated. A man does not exercise at one time faith, and at another time hope or love. They are all of a piece. They are but different manifestations of one virtue. Of these love is the greatest, because it is that without which faith and hope could not exist. Love is of the very essence of the Christian life. It is its secret and sign. No other term is so expressive of the spirit of Christ. It is the first and last word of apostolic Christianity. Love may be called the discovery of the Gospel. It was practically unknown in the ancient world. _Eros_, the sensuous instinct and _philia_, the bond of friendship, did exist, but _agape_ in its spiritual sense is the creation of Christ. In Christian Ethics love is primal and central. Here we have got down to the bedrock of virtue. It is not simply one virtue among many. It is the quality in which all the virtues have their setting and unity. From a Christian point of view every excellence of character springs directly from love and is the manifestation of it. It is, as St. Paul says, 'the bond of perfectness.' The several virtues of the Christian life are but facets of this one gem.[16] Love, according to the apostle, is indispensable to character. Without it Faith is an empty profession; {197} Knowledge, a mere parade of learning; Courage, a boastful confidence; Self-denial, a useless asceticism. Love is the fruitful source of all else that is beautiful and noble in life. It not only embraces but produces all the other graces. It creates fortitude; it begets wisdom; it prompts self-restraint and temperance; it tempers justice. It manifests itself in humility, meekness, and forgiveness: 'As every hue is light, So every grace is love.'