1. That the points of difference between us are of the _very highest possible importance_, and not matters of mere theoretical speculation, as some of your writers have striven vainly to make appear; that, in short, if Unitarians be sound interpreters of Holy Scripture, we Trinitarians are guilty of the most heinous of all sins—_idolatry_; and if, on the other hand, ours be the creed of the apostles, saints, and martyrs, Unitarians are sunk in _the most blasphemous and deadly error_, and are wholly unworthy of being considered _Christians_, in any proper sense of the word. And seeing, 2. That considerable numbers, it is apprehended, especially among the middling and lower classes, who outwardly profess Unitarian principles, are in total ignorance of the unscriptural nature and dangerous character of those principles. And seeing, 3. That the controversial discussion of disputed points was unquestionably the practice of the apostolic and primitive, as well as of all other ages of religious revival, and is calculated as a means, under the good blessing of Almighty God, to “open men’s eyes, and to turn them from darkness to light;”—We invite and beseech you, by the mercies of God in Christ, to come and give us at least a patient hearing, while we endeavour to “persuade you concerning Jesus,” and “by all means to win some of you.” It is impossible that we can have any base or worldly motive in thus addressing you—any other motive, indeed, besides that which is here avouched, viz., _our solemn impression of the value of souls, and of the peril to which the false philosophy of Unitarianism exposes them_. Surely it is a sweet and a pleasant thing,—a thing not to divide and sever, but to unite and to gather into the bonds of dearest affection—thus to tell and to hear together of the great things which our God has done for our souls; of His love to us, when He, “Who thought it not robbery to be equal with God, did take upon him the form of a servant, and, being found in fashion as a man, did humble himself, and become obedient unto death, even the death of a cross.”—Phil. ii. 6-8. It is the intention of my reverend brethren and myself to meet together on the morning of Tuesday, the 5th of February, (the day immediately preceding the commencement of the course,) for the purpose of solemn humiliation before God, and earnest prayer for the blessing of our Heavenly Father, upon the work in which we are about to engage, that we may be enabled to exhibit and preserve “the mind of Christ,” while employed in “contending for the faith,” and that we may have great success in our endeavours to be instrumental in enlightening the eyes which we believe to have been blinded by “the god of this world,” and causing “the light of the glorious gospel of Christ, WHO IS THE IMAGE OF GOD, to shine unto them.”—2 Cor. iv. 4.