How then shall they call on Him in whom they have not believed? – Romans 10:14

The faith that comes behind Christ, and touches the hem of His garment, is a saving faith; and I think that is what you are doing when you say, “Lord Jesus, save me.” If this is a real prayer, and not a sham one, if it comes from your heart, there is, at any rate, a tint, a shade, if not an actual color of faith, upon your soul already.

How could you call on Him in whom you have not believed? Would we call for help from a person who we did not think would help us or could help us? No; the mere fact of calling upon anyone for help proves that we have some measure of confidence in that person, that he can and will help us. Well, if you believe as much as that concerning Christ, and if you will cast yourself upon the believing that you shall be saved, I would that you had more faith, but even that little faith will bear thee into heaven.

You believe also that Christ can and does hear you. Ah, you would not have been alone upstairs this afternoon, crying for mercy, if you had thought that there was nobody to hear you! Rational beings do not go and ask of nobody. You believe that Christ is able to hear you, and you have some faith that He does hear you, for which I am very thankful indeed.

I think that I may add that you are measurably trusting to Christ Certainly, you are not trusting to anybody else. The fact that you often pray to Him for mercy, for the pardon of sin, for the renewal of your nature, proves that you have some degree, at least, some faint measure of faith in Him. Now, let me exhort you, while you keep on praying, to mix more faith with your praying. “With all thine offerings thou shalt offer salt,” and with all thy prayings you shall offer faith. ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/2327.cfm