To expect that religion could ever be placed again beyond the reach of scientific treatment or honest criticism, shows an utter misapprehension of the signs of the times, and would, after all, be no more than to set up private judgment against private judgment. If the inalienable rights of private judgment, that is, of honesty and truth, were more generally recognised, the character of religious controversy would at once be changed. It is restriction that provokes resentment, and thus embitters all discussions on religious subjects.

Gifford Lectures, III.

So far from being dishonest, the distinction between a higher and a lower form of religion is in truth the only honest recognition of the realities of life. If to a philosophic mind religion is a spiritual love of God, and the joy of his full consciousness of the spirit of God within him, what meaning can such words convey to the millions of human beings who nevertheless want a religion, a positive, authoritative, or revealed religion, to teach them that there is a God, and that His commands must be obeyed without questioning?

Gifford Lectures, III.

People ask what can be gained by a comprehensive study of religions, by showing that, as yet, no race has been discovered without some word for what is not visible, not finite, not human, for something superhuman and divine. Some theologians go even so far as to resent the discovery of the universality of such a belief. They are anxious to prove that human reason alone could never have arrived at a conception of God. They would much rather believe that God has left Himself without witness than that a belief in something higher than the Finite could spring up in the human heart from gratitude to Him who gave us rain from heaven, and fruitful seasons, filling our hearts with food and gladness.

Gifford Lectures, III.

Physical religion, beginning in a belief in agents behind the great phenomena of nature, reached its highest point when it had led the human mind to a belief in one Supreme Agent or God, whatever his name might be. It was supposed that this God could be implored by prayers and pleased by sacrifices. He was called the father of gods and men. Yet even in his highest conception, he was no more than what Cardinal Newman defined God to be. 'I mean by the Supreme Being,' he wrote, 'one who is simply self-dependent, and the only being who is such. I mean that he created all things out of nothing, and could destroy them as easily as he made them, and that, in consequence, he is separated from them by an abyss, and incommunicable in all his attributes.' This abyss separating God from man remains at the end of Physical Religion. It constitutes its inherent weakness. But this very weakness becomes in time a source of strength, for from it sprang a yearning for better things. Even the God of the Jews, in His unapproachable majesty, though He might be revered and loved by man during His life on earth, could receive, as it were, a temporary allegiance only, for 'the dead cannot praise God, neither any that go down into darkness!' God was immortal, a man was mortal; and Physical Religion could not throw a bridge over the abyss that separated the two. Real religion, however, requires more than a belief in God, it requires a belief in man also, and an intimate relation between God and man, at all events in a life to come. There is in man an irrepressible desire for continued existence. It shows itself in life in what we may call self-defence. It shows itself at the end of life and at the approach of death, in the hope of immortality.

Gifford Lectures, III.

So long as we look on the history of the human race as something that might or might not have been, we cannot wonder that the student of religion should prefer to form his opinions of the nature of religion and the laws of its growth from the masterpiece of Thomas Aquinas, the Summa Sacræ Theologiæ, rather than from the Sacred Books of the East. But when we have learnt to recognise in history the realisation of a rational purpose, when we have learnt to look upon it as in the truest sense of the word a Divine Drama, the plot revealed in it ought to assume in the eyes of a philosopher also, a meaning and a value far beyond the speculations of even the most enlightened and logical theologians.

Gifford Lectures, IV.