"The whole gospel, with all its mysteries": High and Dry preaching

From Horsley's 1800 Charge to the clergy of the diocese of Rochester, a reminder that 'High and Dry' preaching was to be robustly Christocentric and doctrinal:

But if, instead of thus preaching Christ, you are content to preach only Socrates or Seneca, — if, instead of the everlasting gospel of the living God, you preach some extract only of your own, accommodated, by a bold retrenchment of mysteries, to the blindness and the pride of human reason, - depend upon it, animated enthusiasm will be an overmatch for dry frigid ethics; superstition will be an overmatch for all such mutilated gospels; and crafty Atheism, taking advantage of the extravagance of the first, the insipidity of the second, the enormities of the third, and of the rash oncessions of half-believers, will make an easy conquest of them all. In delivering the great mysterious truths of the gospel, and I repeat it, the whole gospel, with all its mysteries, must be preached in all congregations - I would advise you to use in general not an argumentative but a plain didactic style : “Teach with authority, not as the Scribes :" Upon the momentous doctrines of man's corruption - of Christ's atonement- the gratuitous acceptance of man’s imperfect works in regard to Christ's merits - of the justification of man - of good works, always adhering strictly, as I have before said, to the Scriptures, the Thirtynine Articles, and the Homilies.