No one can come to Me unless the Father who sent Me draws him; and I will raise him up at the last day.
(John 6:44)
"It is the Spirit who gives life; the flesh profits nothing. The words that I speak to you are spirit, and they are life. But there are some of you who do not believe.” For Jesus knew from the beginning who they were who did not believe, and who would betray Him. And He said, “Therefore I have said to you that no one can come to Me unless it has been granted to him by My Father.”
(John 6:63-65)
He who is of God hears God’s words; therefore you do not hear, because you are not of God.
(John 8:47)
And Jesus walked in the temple, in Solomon’s porch. Then the Jews surrounded Him and said to Him, “How long do You keep us in doubt? If You are the Christ, tell us plainly.”
Jesus answered them, “I told you, and you do not believe. The works that I do in My Father’s name, they bear witness of Me. But you do not believe, because you are not of My sheep, as I said to you. My sheep hear My voice, and I know them, and they follow Me. And I give them eternal life, and they shall never perish; neither shall anyone snatch them out of My hand. My Father, who has given them to Me, is greater than all; and no one is able to snatch them out of My Father’s hand. I and My Father are One.”
(John 10:23-30)
All that the Father gives Me will come to Me, and the one who comes to Me I will by no means cast out.
(John 6:37)