Last night, I endeavoured to show you what scepticism is, and what it leads to. We saw that scepticism is not simply doubt, but that it is doubt of a particular kind. It is that state of doubt which arises from insisting on referring every question for solution to one part, and one only, of our nature, to the sceptical understanding. It is that state of doubt which arises from refusing to believe until it has been made scientifically and mathematically impossible to doubt. And we saw what this leads to; we saw that it necessarily leads to the destruction of all belief properly so-called, to the destruction of every kind of assent, except assent to scientific and demonstrated facts; that it puts an end to all belief which rests upon moral certainty, as distinguished from scientific certainty, and therefore it puts an end to all belief that appeals to any part of our nature except the understanding; all belief with which the heart and spirit of man have anything to do; all belief of the higher and nobler kind; all belief that arises out of the higher and nobler part of our nature; all belief that is in character and essence moral, and all the higher and nobler life which arises out of such belief. We saw that scepticism was essentially fatal to morality; that there is no scientific demonstration of morality, and that in order to be moral it is necessary to exercise an act of faith; that morality cannot justify itself to the sceptical understanding; as we saw that as religion is not capable of scientific demonstration, as it does appeal to something else than the logical faculty, as it does appeal to man’s heart and spirit, it cannot justify itself to the sceptical intellect; and that scepticism is necessarily as fatal to religion as it is to morality, and to all belief except scientific belief.