It seems not improbable that Mr. Mill may have had in mind something like the foregoing considerations when he suggested that there is no reason why one should not entertain the belief in a future life if the belief be necessary to one's spiritual comfort. Perhaps no suggestion in Mr. Mill's richly suggestive posthumous work has been more generally condemned as unphilosophical, on the ground that in matters of belief we must be guided, not by our likes and dislikes, but by the evidence that is accessible. The objection is certainly a sound one so far as it relates to scientific questions where evidence is accessible. To hesitate to adopt a well-supported theory because of some vague preference for a different view is in scientific matters the one unpardonable sin,--a sin which has been only too often committed. Even in matters which lie beyond the range of experience, where evidence is inaccessible, desire is not to be regarded as by itself an adequate basis for belief. But it seems to me that Mr. Mill showed a deeper knowledge of the limitations of scientific method than his critics, when he thus hinted at the possibility of entertaining a belief not amenable to scientific tests. The hypothesis of a purely spiritual unseen world, as above described, is entirely removed from the jurisdiction of physical inquiry, and can only be judged on general considerations of what has been called "moral probability"; and considerations of this sort are likely, in the future as in the past, to possess different values for different minds. He who, on such considerations, entertains a belief in a future life may not demand that his sceptical neighbour shall be convinced by the same considerations; but his neighbour is at the same time estopped from stigmatizing his belief as unphilosophical.