Ten days after the date of this letter Wesley accepted the proposal, and Burton expressed his pleasure, and added, “You have too much steadiness of mind to be disturbed by the light scoffs of the idle and profane.”[140] In another long letter (hitherto unpublished), dated Eton College, September 28, 1735, Dr. Burton, after reminding Wesley that he will have a fine opportunity for usefulness during the voyage to Georgia, proceeds to recommend him, on his arrival, to visit from house to house, and preach everywhere. He tells him that “some of the colonists are ignorant, and most of them are disposed to licentiousness.” He adds: “You will find abundant room for the exercise of patience and prudence, as well as piety. One end for which we were associated was the conversion of negro slaves. As yet, nothing has been attempted in this way; but a door is opened. The Purisburghers have purchased slaves; they act under our influence; and Mr. Oglethorpe will think it advisable to begin there. You see the harvest truly is great. With regard to your behaviour and manner of address, you will keep in mind the pattern of St. Paul, who became ‘all things to all men that he might gain some.’ In every case, distinguish between what is essential and what is merely circumstantial to Christianity; between what is indispensable and what is variable; between what is of Divine and what is of human authority. I mention this, because men are apt to deceive themselves in such cases; and we see the traditions and ordinances of men frequently insisted on with more vigour than the commandments of God to which they are subordinate.” This was good advice, and, in Wesley’s case, not unneeded. Sixteen days after the date of Dr. Burton’s letter, Wesley embarked, taking with him five hundred and fifty copies of a treatise on the Lord’s Supper, besides other books,—“the gift of several Christian friends for the use of the settlers in Georgia.”[141]