John 6:63-65 NIV

[63] The Spirit gives life; the flesh counts for nothing. The words I have spoken to you—they are full of the Spirit and life. [64] Yet there are some of you who do not believe.” For Jesus had known from the beginning which of them did not believe and who would betray him. [65] He went on to say, “This is why I told you that no one can come to me unless the Father has enabled them.”