13 Now when Jesus came into the district of Caesarea Philippi, He was asking His disciples, saying, “Who do people say that the Son of Man is?” 14 And they said, “Some say John the Baptist; and others, Elijah; but still others, Jeremiah, or one of the prophets.” 15 He *said to them, “But who do you say that I am?” 16 And Simon Peter answered and said, “You are the Christ, the Son of the living God.” 17 And Jesus answered and said to him, “Blessed are you, Simon Bar-Jonah, because flesh and blood did not reveal this to you, but My Father who is in heaven. 18 And I also say to you that you are Peter, and upon this rock I will build My church; and the gates of Hades will not overpower it. 19 I will give you the keys of the kingdom of heaven; and whatever you bind on earth shall have been bound in heaven, and whatever you loose on earth shall have been loosed in heaven.” 20 Then He warned the disciples that they should tell no one that He was the Christ. Matthew 16:13-20 (LSB)
Genuine Christians, God’s heirs, are those who have believed.
16 “For God so loved the world, that He gave His only begotten Son, that whoever believes in Him shall not perish, but have eternal life. John 3:16 (LSB)
Carefully read this very familiar passage from John Chapter 3. Who is it that does not perish, but has eternal life? It is whoever believes in the Son. Not everyone who attempts to “follow” Jesus believes.
25 And when they found Him on the other side of the sea, they said to Him, “Rabbi, when did You come here?” 26 Jesus answered them and said, “Truly, truly, I say to you, you seek Me, not because you saw signs, but because you ate of the loaves and were filled. 27 Do not work for the food which perishes, but for the food which endures to eternal life, which the Son of Man will give to you, for on Him the Father, God, set His seal.” 28 Therefore they said to Him, “What should we do, so that we may work the works of God?” 29 Jesus answered and said to them, “This is the work of God, that you believe in Him whom He has sent.” 30 So they said to Him, “What then do You do for a sign so that we may see, and believe You? What work do You perform? 31 Our fathers ate the manna in the wilderness; as it is written, ‘HE GAVE THEM BREAD FROM HEAVEN TO EAT.’” 32 Jesus then said to them, “Truly, truly, I say to you, Moses has not given you the bread from heaven, but My Father gives you the true bread from heaven. 33 For the bread of God is that which comes down from heaven and gives life to the world.” 34 Then they said to Him, “Lord, always give us this bread.” 35 Jesus said to them, “I am the bread of life. He who comes to Me will never hunger, and he who believes in Me will never thirst. 36 But I said to you that you have seen Me, and yet do not believe.John 6:25-36 (LSB)