Virtue may be defined as the acquired power or capacity for moral action. From the Christian point of view virtue is the complement, or rather the outcome, of grace. Hence virtues are graces. In the Christian sense a man is not virtuous when he has first appropriated by faith the new principle of life. He has within him, indeed, the promise and potency of all forms of goodness, but not until he has consciously brought his personal impulses and faculties into the service of Christ can he be called truly virtuous. Hence the Christian character is only progressively realised. On the divine side virtue is a gift. On the human side it is an activity. Our Lord's figure of the vine and the branches represents the relation in which Christian character stands to Christ. In like manner St. Paul regards the manifestations of the Christian life as the fruit of the Spirit--the inevitable and natural outgrowth of the divine seed of life implanted in the heart. Hence arises the importance of {185} cultivating the inner life of the spirit which is the root of all moral excellency. On the other hand it must be remembered that Christian morality is not of a different sort from natural morality, and the Christian virtues are not merely supernatural qualities added on, but simply human virtues coloured and transfigured by grace and raised to a higher value. The power to act morally, the capacity to bring all our faculties into the service of the spiritual life, is the ground of Christian virtue just as it is of every natural excellence. From this it follows that the distinction sometimes made between natural goodness and Christian goodness is unsound. A virtue is not a superlative act of merit, implying an excess of excellence beyond the requirements of duty. From the Christian standpoint there are no works of supererogation, and there is no room in the Christian life for excess or margin. As every duty is a bounden duty, so every possible excellence is demanded of the Christian. Virtues prescribe duties; ideals become laws; and the measure is, 'Be ye perfect as your Father in heaven is perfect.' The Stoic maxim, 'Nothing in excess,' is inadequate in reference to moral excellence, and Aristotle's doctrine of the 'Mean' can hardly be applied without considerable distortion of facts. The only virtue which with truth can be described as a form of moderation is Temperance. It has been objected that by his doctrine of the 'Mean' Aristotle 'obliterates the awful and absolute difference between right and wrong.' If we substitute, as Kant suggested, 'law' for 'mean,' some of the ambiguity is obviated. Still, after all extenuation is made it may be questioned whether any term implying quantity is a fit expression for a moral attribute.[3]