But let him ask in faith, with no doubting, for he who doubts is like a wave of the sea driven and tossed by the wind. For let not that man suppose that he will receive anything from the Lord; – James 1:6-7

Don’t come down from that blessed height of simple confidence in God, but ask that you may abide there, and no longer doubt. The Church wants believers to believe for her, and to pray for her. Art thou strong in faith, be thou stronger still; art thou weak in faith, be thou strong.

But let the unbeliever, the utter unbeliever, tremble…He that believeth not is condemned already, because he hath not believed on the Son of God. To you, unbeliever, no angel Gabriel will appear, but the destroying angel awaits you. What shall be your fearful chastisement? You will be silent; it will be eternal. Oh! you shall stand silent at the judgment-seat of Christ, unable to offer any excuse for your rebellion and unbelief. Unbelief will destroy the best of us: faith will save the worst of us. He that believeth on the Lord Jesus Christ hath eternal life-he that believeth not (whatever else his apparent excellences) will assuredly perish. Faith, faith! this is the priceless saving thing to every one of us. The gift be yours to believe. The grace be yours to inherit the righteousness of faith. The joy be yours to believe in Jesus Christ with all your hearts. The triumph be yours to believe now to the saving of your souls. Amen. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/3495.cfm