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 so offensive, is practically excusable; for it is in one sense right and useful that all things, whatever their original or inherent dignity, should be valued at each moment only by their present function and utility.

The error involved in attributing value to the past is naturally aggravated when values are to be assigned to the future. In the latter case imagination cannot be controlled by circumstantial evidence, and is consequently the only basis for judgment. But as the conception of a thing naturally evokes an emotion different from that involved in its presence, ideals of what is desirable for the future contain no warrant that the experience desired would, when actual, prove to be acceptable and good. An ideal carries no extrinsic assurance that its realisation would be a benefit. To convince ourselves that an ideal has rational authority and represents a better experience than the actual condition it is contrasted with, we must control the prophetic image by as many circumlocutions as possible. As in the case of fame, we must buttress or modify our spontaneous judgment with all the other judgments that the object envisaged can prompt: we must make our ideal harmonise with all experience rather than with a part only. The possible error remains even then; but a practical mind will always accept the risk of error when it has made every possible correction. A rational will is not a will