Mill, in what is still the best defence of this system, continues: "Utilitarians ... are ... of opinion that in the long run the best proof of a good character is good actions; and resolutely refuse to consider any mental disposition as good, of which the predominant tendency is to produce bad conduct."[26] "The creed which accepts as the foundation of morals, Utility, or the Greatest Happiness Principle, holds that actions are right in proportion as they tend to promote happiness, wrong as they tend to produce the reverse of happiness."[27] The Theistic writer says "the essence of morality is sacrifice."[28] The utilitarian morality does recognize in human beings the power of sacrificing their own greatest good for the good of others. It only refuses to admit that sacrifice is itself a good. A sacrifice that does not increase, or tend to increase, the sum total of happiness, it considers as wasted. As regards "conscience": the Utilitarian, when he attempts an analysis, realizes that "in that complex phenomenon as it actually exists, the simple fact is in general all encrusted over with collateral associations derived from sympathy, from love, and still more from fear; from all forms of religious feeling; from recollections of childhood and of all our past life; from self-esteem, desire of the esteem of others, and occasionally even self-abasement."[29] For the priest "ethics cannot be built securely upon anything less than religious sanctions, and it is for the sake of conscience that ethics have a practical value."[30] Can an honest and unbiased thinker doubt that the first is the truer statement? Let us now return to a further statement of the position of Utilitarianism as dealt with by J. S. Mill. From Professor Sidgwick and those Utilitarians who attempt to claim for the atheistic moralist a conscience of mathematical accuracy we are unlikely to derive much assistance. "According to the Greatest Happiness Principle, the ultimate end, with reference to, and for the sake of which, all other things are desirable (whether we are considering our own good or that of other people), is an existence exempt as far as possible from pain and as rich as possible in enjoyments, both in point of quantity and quality; the test of quality, and the rule for measuring it against quantity, being the preference felt by those who, in their opportunities of experience, to which must be added their habits of self-consciousness and self-observation, are best furnished with the means of comparison."[31] This, according to Utilitarians, is also the standard of morality.