The attitude which the Professor maintained in regard to the doctrine and worship of the Church was a strictly conservative one, and may be best described in his own words, taken from an article included in the list of his minor works. In that article, after quoting the advice tendered by an eminent minister of the Church of England to a minister of the Church of Scotland--"Stick by your own Kirk: it is an honest Kirk, one of the few that has fairly rid itself of sacerdotalism and ritualism, and you have no cause to be ashamed of it"--he goes on to say: "The advice is not unneeded in the present day by others than he to whom it was originally tendered, and I give it this publicity for the benefit of all whom it may concern. The Reformed Church of Scotland from the first rid herself of these medieval corruptions, and the attempt to bring her again under the yoke issued in dire disaster to those who made it. This surely is no time for the Presbyterian Churches to swerve from the testimony they have so long and resolutely borne against all such errors. When we think of the mischief they are now causing in the Church of England, and the grief they are occasioning to many of her most loyal sons, rather does it become us to bear more decided testimony to the truths, that under the New Testament there is but one Priest, who ever liveth to make intercession for us, and one sacrifice once offered, which perfects for ever them that are sanctified; that He has not communicated His priestly office to His ministers either by succession or delegation, nor authorised them to repeat or continue that sacrifice which is the propitiation for sin; and that He has neither Himself imposed, nor warranted others to impose, a load of 'fondly' invented ceremonies in His worship." If the Professor thus strenuously opposed sacerdotalism on the one hand, he had as little sympathy with Broad Churchism on the other. The non-natural sense in which the narratives of the New Testament miracles are understood and interpreted by some of the modern critics he rejected as subversive of Christian truth, a common saying of his being, "If the Gospel is not true historically, it is not true at all: 'If Christ be not raised, your faith is vain'"; and while he mellowed with advancing years, he never wavered in his deep religious convictions, nor for a moment relaxed the tenacious grasp which he had of the doctrines of Christianity as set forth in the standards of the Reformed Churches. One of his latest sayings was, "I die in the faith which I have always professed."