There is a point, moreover, at which the physiology of this great subject touches closely on its moral and religious bearings, for it has been found that physical weariness leads to mental lassitude, and that mental lassitude indisposes the soul to moral considerations. Nor would it be easy to calculate to what an extent the recurrence of the Sabbath, where its hours have been turned to their proper and appointed uses, has been of moral advantage to our commercial men and our merchant princes, checking the fever of reckless speculation, restoring the moral balance of the mind, and "winding up the soul, which the body had poised down, to a higher degree of heavenliness." "A Sunday in solitude," said one of the greatest English statesmen of the last age, "never failed to restore me to myself." Facts like these, which might be almost indefinitely multiplied, do more than demonstrate the inestimable value of the Sabbath: they appear to me to suggest, on their own independent grounds, that an institution possessing such wise and benignant adaptations to our complex nature, must have been appointed by Him that made us and who "knows our frame;" and that "while the Sabbath was made _for_ man, it was not made _by_ him." A great writer on natural religion has founded a beautiful argument for the existence and unity of God, on the adaptation of day and night to the physical nature of man: might not an argument of equal soundness and force for the Divine origin of the Sabbath, be founded on its adaptation to our physical, intellectual, and spiritual nature?
8. But while it is unquestionable that the Sabbath argument has gained a large and permanent addition to its force from the experience and discussions of the last twenty years in Scotland, I have already said enough to apprise you that _this divine and truly beneficent institution is not without its enemies and its dangers_. I shall be forgiven when I express my fear that the increased influx of persons from other countries in which "the day of the Lord" is less honoured and hallowed, has had some effect in lowering the standard of its observance among ourselves.--I do not think that the arguments of ultra-spiritualists, who tell us that every day should be a Sabbath, has had much effect in misleading any who were not already willing to be misled. The device was too transparently shallow to do much harm where it had the characteristic shrewdness of the Scottish mind to deal with it. For why, it was answered, on the same principle, might it not be said that men should be always praying; and that therefore it was unnecessary to have fixed times and places for our secret devotions, and that we ought to dispense with the use of words. It was noticed, moreover, that if things were not sometimes solemnly done, they were likely to be never done, and that "every day a Sabbath" came practically to mean "no Sabbath at all."--At one period the railway system, which attempted to introduce with it railway travelling and traffic on the Lord's day, threatened to do violence to our religions convictions and national habits, and to introduce among us a wide-spread and constantly-growing mischief. But this plague was speedily stayed. The religious traditions of our community proved in most instances too strong for the cupidity of men who seemed prepared to sacrifice the highest interests, and to trample on the most sacred feelings of a whole community, for the sake of a larger annual dividend. The majority of our railways in Scotland do not run trains on Sabbath at all; and this is found to operate with immense gain to the public morals, with no inconvenience to trade or commerce, or even pecuniary loss to the proprietors of those stupendous undertakings.