“There is no saint here who can out-believe God. You know that God never out-promised Himself yet. Some people do; they say they will do wonderful things, but they promise what they cannot perform, or they find it inconvenient to fulfil their plighted word.
That never yet happened to the God of heaven and earth. He has never out-promised himself. There have been some men who have believed great things of God and have gone a long way in believing. But there has never lived any man who has out-believed God.
Come now, and put Him to the test. Believe that He can blot out your sin before you leave this place. Trust His Son to do it, and it shall be done. Believe that He will make a new man of you, creating you anew in Christ Jesus, and it shall be done.
Believe that He will fill your heart with abounding comfort and overflowing joy; whereas, aforetime, you have been desponding, and well-nigh despairing and it shall be done.
Believe that He will keep you from falling all your life, and present you faultless before His presence with exceeding joy and it shall be done.
Believe that He will be with you in life, and with you in death, and with you at the judgment-seat, and with you to all eternity and it shall be done.
You may open your mouth wide, but He will fill it; and when He has filled it, there will be as much more left for others as they will be able to receive. In the name of God, I challenge you to out-believe Him if you can.”
–Charles H. Spurgeon, “Observing the King’s Word,” in The Metropolitan Tabernacle Pulpit Sermons, Vol. XLIX (London: Passmore & Alabaster, 1903), 501-502. Spurgeon preached this sermon on October 21, 1877 at the Metropolitan Tabernacle in London.