§5. How then can we hope to eliminate error from our moral intuitions? One answer to this. question was briefly suggested in a previous chapter where the different phases of the Intuitional Method were discussed. It was there said that in order to settle the doubts arising from the uncertainties and discrepancies that are found when we compare our judgments on particular cases, reflective persons naturally appeal to general rules or formulae: and it is to such general formulae that Intuitional Moralists commonly attribute ultimate certainty and validity. And certainly there are obvious sources of error in our judgments respecting concrete duty which seem to be absent when we consider the abstract notions of different kinds of conduct; since in any concrete case the complexity of circumstances necessarily increases the difficulty of judging, and our personal interests or habitual sympathies are liable to disturb the clearness of our moral discernment. Further, we must observe that most of us feel the need of such formulae not only to correct, but also to supplement, our intuitions respecting particular concrete duties. Only exceptionally confident persons find that they always seem to see clearly what ought to be done in any case that comes before them. Most of us, however unhesitatingly we may affirm rightness and wrongness in ordinary matters of conduct, yet not unfrequently meet with cases where our unreasoned judgment fails us; and where we could no more decide the moral issue raised without appealing to some general formula, than we could decide a disputed legal claim without reference to the positive law that deals with the matter.
And such formulae are not difficult to find: it only requires a little reflection and observation of men's moral discourse to make a collection of such general rules, as to the validity of which there would be apparent agreement at least among moral persons of our own age and civilisation, and which would cover with approximate completeness the whole of human conduct. Such a collection, regarded as a code imposed on an individual by the public opinion of the community to which he belongs, we have called the Positive Morality of the community: but when regarded as a body of moral truth, warranted to be such by the consensus of mankind,---or at least of that portion of mankind which combines adequate intellectual enlightenment with a serious concern for morality---it is more significantly termed the morality of Common Sense.
When, however, we try to apply these currently accepted principles, we find that the notions composing them are often deficient in clearness and precision. For instance, we should all agree in recognising Justice and Veracity as important virtues; and we shall probably all accept the general maxims, that `we ought to give every man his own' and that `we ought to speak the truth': but when we ask (1) whether primogeniture is just, or the disendowment of corporations, or the determination of the value of services by competition, or (2) whether and how far false statements may be allowed in speeches of advocates, or in religious ceremonials, or when made to enemies or robbers, or in defence of lawful secrets, we do not find that these or any other current maxims enable us to give clear and unhesitating decisions. And yet such particular questions are, after all, those to which we naturally expect answers from the moralist. For we study Ethics, as Aristotle says, for the sake of Practice: and in practice we are concerned with particulars.
Hence it seems that if the formulae of Intuitive Morality are really to serve as scientific axioms, and to be available in clear and cogent demonstrations, they must first be raised---by an effort of reflection which ordinary persons will not make---to a higher degree of precision than attaches to them in the common thought and discourse of mankind in general. We have, in fact, to take up the attempt that Socrates initiated, and endeavour to define satisfactorily the general notions of duty and virtue which we all in common use for awarding approbation or disapprobation to conduct. This is the task upon which we shall be engaged in the nine chapters that follow. I must beg the reader to bear in mind that throughout these chapters I am not trying to prove or disprove Intuitionism, but merely by reflection on the common morality which I and my reader share, and to which appeal is so often made in moral disputes, to obtain as explicit, exact, and coherent a statement as possible of its fundamental rules.