Charles H. Spurgeon on Psalms 9:10

"They that know thy name will put their trust in thee." Faith is an intelligent grace; though there can be knowledge without faith, yet there can be no faith without knowledge. One calls it quicksighted faith. Knowledge must carry the torch before faith. 2 Timothy 1:12. "For I know whom I have believed." As in Paul's conversion a light from heaven "Shined round about him" (Acts 9:3), so before faith be wrought, God shines in with a light upon the understanding. A blind faith is as bad as a dead faith: that eye may as well be said to be a good eye which is without sight, as that faith is good without knowledge. Devout ignorance damns; which condemns the church of Rome, that thinks it a piece of their religion to be kept in ignorance; these set up an altar to an unknown God. They say ignorance is the mother of devotion; but sure where the sun is set in the understanding, it must needs be night in the affections. So necessary is knowledge to the being of faith, that the Scriptures do sometimes baptise faith with the name of knowledge. Isaiah 53:11. "By his knowledge shall my righteous servant justify many." Knowledge is put there for faith. Thomas Watson.