George Mueller says:
When I first began to allow God to deal with me, relying on Him, taking Him at His Word, and set out fifty years ago simply relying on Him for myself, family, taxes, travelling expenses and every other need, I rested on the simple promises I found in the sixth chapter of Matthew. Read Matthew 6:25-34 carefully. I believed the Word, I rested on it and practiced it. I took God at His word. A stranger, a foreigner in England, I knew seven languages and might have used them perhaps as a means of remunerative employment but I had consecrated myself to labor for the Lord, I put my reliance in the God who has promised, and He has acted according to His Word. I've lacked nothing – nothing. I have had my trials, my difficulties, and my purse empty, but my receipts have aggregated thousands of dollars, while the work has gone on these 51 years. Then, with regard to my pastoral work; for the past 51 years I have had great difficulties, great trials and perplexities. There will always be difficulties, always trials. But God has sustained me under them and delivered nw out ofthem, and the work has gone on. Now, this is not, as some have said, because I am a man of great mental power, or endowed with energy and perseverance – these are not the reasons. It is because I have confided in God; because I have sought God, and He has cared for the Institution, which, under His direction, has 100 schools, with masters and mistresses and other departments which I have told you before.
I do not carry the burden. And now in my 67th year, I have physical strength and mental vigor for as much work as when I was a young man in the university, studying and preparing Latin orations. I am just as vigorous as at that time. How comes this? Because in the last half century of labor I've been able, with the simplicity of a child, to rely upon God. I have had my trials, but I have laid hold upon God, and so it has come to pass that I have been sustained. It is not only permission, but positive command that He gives, to cast the burdens upon Him. Oh, let us do it! My beloved brothers and sisters in Christ, "Cast thy burden upon the Lord and He shall sustain thee." Day by day I do it. This morning sixty matters in connection with the church of which I am pastor, I brought before the Lord, and thus it is, day by day I do it, and year by year; ten years, thirty years, forty years.
Do not, however, expect to obtain full Faith at once. All such things as jumping into full exercise of Faith in such things I discountenance. I do not believe in it. I do not believe in it. I DO NOT BELIEVE IN IT, AND I WISH YOU PLAINLY TO UNDERSTAND I DO NOT BELIEVE IN IT. All such things go on in a natural way. The little I did obtain, I did not obtain all at once. All this I say particularly, because letters come to me full of questions from those who seek to have their Faith strengthened. Begin over again, staying your soul on the Word of God, and you will have an increase of your Faith as you exercise it.