At the same time the virtues must not be regarded as mere abstractions. Moral qualities cannot be isolated from the circumstances in which they are exercised. Virtue is character in touch with life, and it is only in contact with actual events that its quality can be determined. Actions are not simply good or bad in themselves. They must {186} always be valued both by their inner motives and intended ends. Courage or veracity, for example, may be exercised from different causes and for the most various ends, and occasionally even for those of an immoral nature.[4] For these and similar reasons some modern ethical writers have regarded the classification of the virtues as unsatisfactory, involving arbitrary and illogical distinctions in value; and some have even discarded the use of the word 'virtue' altogether, and substituted the word 'character' as the subject of ethical study. But inasmuch as character must manifest itself in certain forms, and approximate at least to certain norms or ideals of conduct, it may not be altogether superfluous to consider in their relation and unity those moral qualities (whether we call them virtues, graces, or norms of excellence) which the Christian aims at reproducing in his life. We shall consider therefore, first, the natural elements of virtue as they have been disclosed to us by classical teachers. Next, we shall compare these with the Christian conception of life, showing how Christianity has given to them a new meaning and value. And finally, we shall endeavour to reveal the unifying principle of the virtues by showing that when transformed by the Christian spirit they are the expressions or implicates of a single spiritual disposition or totality of character. I _The Natural Basis of the Virtues_.--At a certain stage of reflection there arises an effort not merely to designate, but to co-ordinate the virtues. For it is soon discovered that all the various aspects of the good have a unity, and that the idea of virtue as one and conscious is equivalent to the idea of the good-will or of purity of heart. Thus it was seen by the followers of Socrates that the virtues are but different expressions of one principle, and that the ultimate good of character can only be realised by the actual pursuit {187} of it in the recognised virtues. We do not sufficiently reflect, says Green, how great was the service which Greek philosophy rendered to mankind. From Plato and Aristotle comes the connected scheme of virtues and duties within which the educated conscience of Christendom still moves when it is impartially reflecting on what ought to be done.[5] Religious teachers may have extended the scope of our obligations, and strengthened the motives which actuate men in the performance of duty, but 'the articulated scheme of what the virtues and duties are, in their difference and their unity, remains for us now in its main outlines what the Greek philosophers left it.'[6]