The influence of nature on most minds is likely to be a healthful one; still, it is not desirable to allow that influence to become too strong. And there is a further influence which is felt in a solitary life, which ought never to be permitted to gain the upper hand. I mean the influence of our own mental moods. It is not expedient to lead too subjective a life. We look at all things, doubtless, through our own atmosphere; our eyes, to a great extent, make the world they see. And no doubt, too, it is the sunshine within the breast that has most power to brighten; and the thing that can do most to darken is the shadow there. Still, it is not fit that these mental moods should be permitted to arise mainly through the mind's own working. It is not fit that a man should watch his mental moods as he marks the weather; and be always chronicling that on such a day and such another he was in high or low spirits, he was kindly-disposed or snappish, as the case may be. The more stirring influence of intercourse with others, renders men comparatively heedless of the ups and downs of their own feelings; change of scenes and faces, conversation, business engagements, may make the day a lively or a depressed one, though they rose at morning with a tendency to just the opposite thing. But the solitary man is apt to look too much inward; and to attach undue importance to the fancies and emotions which arise spontaneously within his own breast; many of them in great measure the result of material causes. And as it is not a healthy thing for a man to be always feeling his pulse, and fearing that it shows something amiss; it is not a healthy thing to follow the analogous course as regards our immaterial health and development. And I cannot but regard those religious biographies which we sometimes read, in which worthy people of little strength of character record particularly from day to day all the shifting moods and fancies of their minds as regards their religious concerns, as calculated to do a great deal of mischief. It is founded upon a quite mistaken notion of the spirit of true Christianity, that a human being should be ever watching the play of his mind, as one might watch the rise and fall of the barometer; and recording phases of thought and feeling which it is easy to see are in some cases, and in some degree, at least, the result of change of temperature, of dyspepsia, of deranged circulation of the blood, as though these were the unquestionable effects of spiritual influence, either supernal or infernal. Let us try, in the matter of these most solemn of all interests, to look more to great truths and facts which exist quite independently of the impression they may for the time produce upon us; and less to our own fanciful or morbid frames and feelings.