We think it cannot well be doubted, that there have been individuals, both anciently and in modern times, who have been the subjects of this high religious state. And we see no reason, why, instead of being so unfrequent as it is, it should not be the common experience, the common state of Christians. There are some persons, it is true, of minds of so little capacity, that they seem almost incapable of fully understanding the grounds of a perfected Christian life. Others appear to combine, with an adequate understanding, a want of decision, a weakness of purpose, which vitiates and annuls what their reason approves and instigates. And others, again, in consequence of a disordered state of the nervous system, or for some other cause, may be described as constitutionally subject to a sort of conceptive and apparitional experience, or what is hardly more favorable, are under the influence of strong and variable emotional impulses, which throw them off from the true track. But with some exceptions of this kind, in which charity, prompted by the acknowledged existence of unusual human infirmity, is disposed, without making any unwarrantable allowances, to diminish, nevertheless, its favorable anticipations, every Christian is very reasonably and justly expected, not only to have faith, but to become assured in faith; to be not only the servant, but the child of God; and to walk with God, and to live with God in the most intimate, affectionate, and sacred communion.
— edited from The Life of Faith (1852) Part 1, Chapter 16.