He that is of God hears God’s words…-John 8:47

The only solid foothold that faith has is, “It is written, God hath said it.” When a sinner comes to God he must have nothing else to rely upon except this, “Do as Thou hast said.” There is a tendency in most men’s minds to bring before God something which He did not say. Many of you, I dare say, will go and ask God in prayer for something for which you cannot prove a positive promise that He will ever give it to you. You go to God and say, “Lord, do as John Bunyan said, do as Whitefield said, let me have an experience like theirs.” Now, that is all wrong. We must, when we come to God, say only, “Lord, do as Thou hast said.” And then, again, I do believe that many of those who are members of our churches have not put their faith simply in what God has said. If I were to go round to some of you and ask you why you believe yourselves to be Christians, it is marvelous what strange reasons many of you would bring. It is very singular what strange views persons often have as to the way of salvation.

Faith can build on a “thou hast said it;” but it cannot build on frames and feelings, on dreams and experiences-it only relies on this-“Thou hast said it.”…The way of salvation is no great mystery, it is very plain; it is “believe and live.” And faith needs no mysteries to hang itself upon; it catches hold of the bare naked promise, and it says, “Lord, do as thou hast said.” ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0088.cfm