The general tone of the letters is high. The subject is not seldom of supreme interest. Questions are discussed which are rarely discussed in ordinary correspondence. The writer rises above creeds and formularies and arbitrarily established rule. He speculates on a theology beyond the bounds of Calvinism, on a philosophy of the soul above the dialectics of the schoolmen, on a morality at variance with conventional law. He interrogates the intuitions of the mind and the intimations of nature in order that, if possible, he may learn something of the soul's origin, destiny, and supremest duty. But let us hear himself:-- _(a)_ "I have ever looked on mankind in the lump to be nothing better than a foolish, head-strong, credulous, unthinking mob; and their universal belief has ever had extremely little weight with me.... I am drawn by conviction like a Man, not by a halter like an Ass." _(b)_ "_'On Earth Discord! A gloomy Heaven above opening its jealous gates to the nineteen-thousandth part of the tithe of mankind! And below an inexorable Hell expanding its leviathan jaws for the vast residue of mortals!'_ O doctrine comfortable and healing to the weary wounded soul of man! Ye sons and daughters of affliction, to whom day brings no pleasure and night yields no rest, be comforted! 'Tis one to but nineteen hundred thousand that your situation will mend in this world, and 'tis nineteen hundred thousand to one, by the dogmas of theology, that you will be damned eternally in the world to come." _(c)_ "A pillar that bears us up amid the wreck of misfortune and misery is to be found in those feelings and sentiments which, however the sceptic may deny or the enthusiast disfigure them, are yet, I am convinced, original and component parts of the human soul; those _senses of the mind_, if I may be allowed the expression, which link us to the awful obscure realities of an all-powerful and equally beneficent God and a world-to-come beyond death and the grave." _(d)_ "Can it be possible that when I resign this frail, feverish being I shall still find myself in conscious existence?... Shall I yet be warm in life, seeing and seen, enjoying and enjoyed? Ye venerable Sages and holy Flamens, is there probability in your conjectures, truth in your stories, of another world beyond death, or are they all alike baseless visions and fabricated fables? If there is another life, it must only be for the just, the benevolent, the amiable, and the humane; what a flattering idea then is a world to come! Would to God I as firmly believed it as I ardently wish it!... Jesus Christ, thou amiablest of characters! I trust thou art no impostor.... I trust that in Thee shall all the families of the earth be blessed."