After this, distinct habits of piety were formed, Williams was admitted to full membership at the chapel called the Tabernacle, and, together with others of the more earnest young men of the congregation, formed a society called "The Youths' Class," one of those associations which, under whatever form, have, in all ages of Christianity, been found a most powerful and salutary means of quickening, uniting, and strengthening the young by the sense of fellowship. The lads met every Monday evening for discussion, and every eighteenth Monday was devoted to special prayer. The minister of the chapel did not naturally preside, but would often look in, say a few words on the subject in hand, and thus keep watch that the debates were properly conducted. It was through this pastor, Mr. Wilks, that John Williams first imbibed his interest in the missionary cause,--an interest that gradually grew upon him so much, that in his twentieth year he decided upon devoting himself to the task. Good Mr. Wilks freely gave the young ironmonger assistance in supplying the deficiencies of his education, and in July 1816 he was presented to the directors of the London Missionary Society, and passed an examination, after which he was accepted, before he was out of his apprenticeship. According to rule, so young and so insufficiently instructed a man would ordinarily have had some years of training before actually undertaking to labour among the heathen, but there was at the moment an urgent call for aid from various branches, and it was decided, by a special vote of the committee, to send him out as soon as possible to the South Sea Islands. His master willingly released him from the seven months that remained of his term; nor had his time of apprenticeship been by any means wasted, for the mechanical skill he had acquired was of great importance to his success as a civilizer. Marriage was always recommended to the missionaries of the Baptist Societies, and Williams's fate was no sooner decided than he chose Mary Channer, a constant attendant at the Tabernacle, and a woman helpful, kind, and brave, as befitted a missionary's wife.