He succeeds so well with unbelievers that he applies the same method to believers, blinding their eyes to their highest Gospel privilege, the fullness of the Spirit, lest the light of this blessing should gladden their eyes, strengthen their hearts, and intensify their zeal against his kingdom. Says John Wesley, in a letter to a Christian woman respecting her preacher, in 1771:
I hope he is not ashamed to preach full salvation, receivable now by faith. This is the word which God will always bless, and which the devil peculiarly hates; therefore he is constantly stirring up both his own children and the weak children of God against it.
Hence the difficulty which the great Head of the Church has in keeping this doctrine in the pulpit. It dropped out of the English pulpit, and Methodism was raised up to bring it back. Wesley, true to the great light, "the grand depositum intrusted to the Methodists," found his preachers inclined to abandon this precious theme. Even now, after the inquiry on this subject among the laity has become so general, the majority of preachers pass over the subject like a slurred note in music, as if it was a demi-semi-quaver in the jubilant song of our Christianity, and not its very key-note.
—edited from Love Enthroned, Chapter 19.