I will say to the…south, Keep not back… – Isaiah 43:6

That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised Him from the dead, thou shalt be saved. – Romans 10:9

If you have the love of Jesus Christ in your soul, confess it, tell it to others. Never be ashamed of your Lord and Master. Come and unite with His church and people…I should like to have you become perfect, and the nearer perfection the better-but still if you make no profession of faith till you are sinless, it will not be this side of the grave. Nay, confess Christ, for is it not written: “He that with his heart believeth, and with his mouth maketh confession of Him, shall be saved”? Do not forget the confession of the mouth. “Keep not back.” And when you have done that, if there be any Christian excellency that can be reached, do not despair of reaching it. “Keep not back.” And if perfection itself be attainable, never be content till you get it. If you are a child of God, you never will be self-satisfied, you will be always crying: “Not as though I had already attained, either were already perfect: but I follow after, if that I may apprehend that for which also I am apprehended of Christ Jesus.” O that you may never be content with yourself! Self-satisfaction is the death of progress. You have come into the lowest seat at the feast, but Jesus saith: “Friend, come up higher;” and when you get into a higher room, and enter into closer communion with Him, He will say to you, “Friend, come up higher.” Do not hesitate to climb higher in grace and fellowship. Let your prayer be, “Nearer to Thee, my God, nearer to Thee.” Be insatiable in the longings of your soul; hunger and thirst after righteousness; covet earnestly the best gifts. Grow in grace, and in the knowledge of your Lord and Savior Jesus Christ. ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/1007.cfm