Whoever believes that Jesus is the Christ is born of God… – 1 John 5:1

What is meant by “Jesus is the Christ,” or Jesus is the Anointed? First, that He is the Prophet; secondly, that He is the Priest; thirdly, that He is the King of the church, for in all these three senses He is the Anointed. Now, I may ask myself this question: Do I this day believe that Jesus is the great Prophet anointed of God to reveal to me the way of salvation? Do I accept Him as my teacher and admit that He has the words of eternal life? If I so believe, I shall obey His gospel and possess eternal life. Do I accept Him to be henceforth the revealer of God to my soul, the messenger of the covenant, the anointed prophet of the Most High? But He is also a priest. Now, a priest is ordained among men to offer sacrifices; do I firmly believe that Jesus was ordained to offer His one sacrifice for the sins of mankind, by the offering of which sacrifice once for all He has finished the atonement and made complete expiation? Do I accept His atonement as an atonement for me, and receive His death as an expiation upon which I rest my hope for forgiveness of all my transgressions? Do I in fact believe Jesus to be the one sole, only propitiating Priest, and accept Him to act as priest for me? If so, then I have in part believed that Jesus is the Anointed. But He is also King, and if I desire to know whether I possess the right faith, I further must ask myself, “Is Jesus, who is now exalted in heaven, who once bled on the cross, is He King to me? Is His law my law? Do I desire to submit myself entirely to His government? Do I hate what He hates, and love what He loves? Do I live to praise Him? Do I, as a loyal subject, desire to see His kingdom come and His will be done on earth as it is in heaven?” My dear friend, if thou canst heartily and earnestly say, “I accept Jesus Christ of Nazareth to be Prophet, Priest, and King to me, because God has anointed Him to exercise those three offices; and in each of these three characters I unfeignedly trust Him,” then, dear friend, you have the faith of God’s elect, for it is written, “He that believeth that Jesus is the Christ is born of God.” ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0979.cfm