The good which one single minister, true to the cause in which he has engaged, can do in the course of his life by a faithful ministry of the word, is not easily to be described. How many of the ignorant he may instruct, how many sleepy consciences arouse, how many daring sinners confound; how many mourners he may bring into the liberty of the children of God, how many believers confirm in grace, yea, lead into the enjoyment of perfect love! Blessed be the Lord, we have had our ministers, who were formed according to the model of Jesus Christ, according to his simplicity, his unction, his sacred zeal. We have had our WESLEYS, our FLETCHERS, our GRIMSHAWS, and our WALSHES. Every thing was borne down by their holy eloquence, and by the power of the Spirit of God, who spoke through them. The villages, the towns, the cities, could not resist the impetuosity of their zeal, and the eminent sanctity of their lives; the tears, the sighs, and the deep compunction of those who heard them, were the commendations which accompanied their ministry. The strictness of their manners left nothing for the world to say against the truths which they delivered. The simplicity of their spirit, and the gentleness of their conversation and conduct toward others but severity toward themselves, belied not the gospel of which they were ministers. Their examples instructed, persuaded, and struck the people almost as much as their sermons: and the Spirit of God, who inflamed their hearts, the divine fire with which they themselves were filled, spread itself through the coldest and most insensible souls; and enabled them almost everywhere to raise chapels, temples to God, where the penitents and believers might assemble to hear them, and each return inflamed like themselves, and filled with the abundance of the Spirit of God. O what good is one apostolic man capable of working upon earth! There were no more than twelve employed to begin the conversion of the world.
— Thomas Coke (1747 – 1814), On the Ministry: Four Discourses on the Duties of a Minister of the Gospel, Discourse 1, Part 1.