When George Muller, five times within the first eight years after conversion, had offered himself as a missionary, God had blocked his way; now, at sixty-five, He was about to permit him, in a sense he had never dreamed of, to be a missionary to the world. From the beginning of his ministry he had been more or less an itinerant, spending no little time in wanderings about in Britain and on the Continent; but now he was to go to the regions beyond and spend the major part of seventeen years in witnessing to the prayer-hearing God. These extensive missionary tours occupied the evening of Mr. Muller's useful life, from 1875 to 1892. They reached, more or less, over Europe, America, Asia, Africa, and Australia; and would of themselves have sufficed for the work of an ordinary life. They had a singular suggestion. While, in 1874, compelled by Mrs. Muller's health to seek a change of air, he was preaching in the Isle of Wight, and a beloved Christian brother for whom he had spoken, himself a man of much experience in preaching, told him how 'that day had been the happiest of his whole life'; and this remark, with others like it previously made, so impressed him that the Lord was about to use him to help on believers outside of Bristol, that he determined no longer to confine his labours in the Word and doctrine to any one place, but to go wherever a door might open for his testimony. In weighing this question he was impressed with seven reasons or motives, which led to these tours: 1. To _preach the gospel_ in its simplicity, and especially to show how salvation is based, not upon feelings or even upon faith, but upon the finished work of Christ; that justification is ours the moment we believe, and we are to accept and claim our place as accepted in the Beloved without regard to our inward states of feeling or emotion. 2. To _lead believers to know their saved state,_ and to realize their standing in Christ, great numbers not only of disciples, but even preachers and pastors, being themselves destitute of any real peace and joy in the Lord, and hence unable to lead others into joy and peace. 3. To _bring believers back to the Scriptures,_ to search the Word and find its hidden treasures; to test everything by this divine touchstone and hold fast only what will stand this test; to make it the daily subject of meditative and prayerful examination in order to translate it into daily obedience. 4. To _promote among all true believers, brotherly love;_ to lead them to make less of those non-essentials in which disciples differ, and to make more of those great essential and foundation truths in which all true believers are united; to help all who love and trust one Lord to rise above narrow sectarian prejudices, and barriers to fellowship.