「耶和華的眼目遍察全地，要加強那些心中純全向著祂的人。」－歷代志下16:9
神今天比以往任何一個時代更急切尋找這樣的人，祂渴望藉著他們來成就祂的工作，因為萬物的終結已經臨近了。
－C. H. P.
在90歲那年，喬治慕勒對一班傳道同工說到他個人的見證：
我在1825年的11月就已經信主，但直到四年過後的1829年7月，我才將全心降服於祂。
從那時開始，錢財的吸引褪色了，名利和地位也相繼失色變味，世俗的宴樂對我也形同無物。從那時起，我知道唯有神自己，能成為我唯一的產業。
我在祂裡面找到了我所需的一切；除祂以外，我別無所求。
因著神的恩典，直到現今我從未改變過，我成了一個常常喜樂的人，一個無時無刻都喜樂滿懷的人。除了神自己，我不再注意其他的任何事物。
親愛的弟兄姊妹們，容許我熱切的問你們這話：你們的心真的全然歸神嗎？還是你仍然有幾件隨己意任意妄為的事呢？
以往我聖經讀的很少，其他閒雜書籍比較能吸引我；但當神將祂自己啟示在我心裡，使我有了滿足的福樂之後，我就能從內心深處向你們見證：神真是可愛至極，令我著迷不已。
弟兄姊妹們，不要說你已經得著完全的滿足，直到你能從心底見證：「神真是可愛至極，令我著迷不已」。－選
"The eyes of the Lord run to and fro throughout the whole earth, to show himself strong in the behalf of them whose heart is perfect toward him" (2 Chron. 16:9).God is looking for a man, or woman, whose heart will be always set on Him, and who will trust Him for all He desires to do. God is eager to work more mightily now than He ever has through any soul. The clock of the centuries points to the eleventh hour.
"The world is waiting yet to see what God can do through a consecrated soul." Not the world alone, but God Himself is waiting for one, who will be more fully devoted to Him than any who have ever lived; who will be willing to be nothing that Christ may be all; who will grasp God's own purposes; and taking His humility and His faith, His love and His power, will, without hindering, continue to let God do exploits. --C. H. P.
"There is no limit to what God can do with a man, providing he will not touch the glory."
In an address given to ministers and workers after his ninetieth birthday, George Mueller spoke thus of himself: "I was converted in November, 1825, but I only came into the full surrender of the heart four years later, in July, 1829. The love of money was gone, the love of place was gone, the love of position was gone, the love of worldly pleasures and engagements was gone. God, God alone became my portion. I found my all in Him; I wanted nothing else. And by the grace of God this has remained, and has made me a happy man, an exceedingly happy man, and it led me to care only about the things of God. I ask affectionately, my beloved brethren, have you fully surrendered the heart to God, or is there this thing or that thing with which you are taken up irrespective of God? I read a little of the Scriptures before, but preferred other books; but since that time the revelation He has made of Himself has become unspeakably blessed to me, and I can say from my heart, God is an infinitely lovely Being. Oh, be not satisfied until in your own inmost soul you can say, God is an infinitely lovely Being!' --Selected
