64 But there are some of you that believe not. For Jesus knew from the beginning who they were that believed not, and who should betray him. 65 And he said, Therefore said I unto you, that no man can come unto me, except it were given unto him of my Father. 66 From that time many of his disciples went back, and walked no more with him. Notice that verse 65 is sandwiched between verses 64 and 66 for good reason. In verse 64 Jesus explicitly reveals that He knew who the real unbelievers were among his professed disciples - "some of you believe not." In verse 66 these are the ones that "went back." They went back upon their profession. The "walked no more with him" and demonstrated their profession had been empty. Now, verse 65 is the explanation that Christ gives for why they did not believe and why they went back on their profession and walked with him no more. In verse 65 the words "therefore said I unto you" has direct reference to John 6:44 and the statement that no man can come to Christ but those drawn by the Father, and those will not "draw back" or "walk with him no more" because "him" that is drawn is "him" that Christ promises to raise up again at the last day. Furthermore, in verse 65 Jesus replaces the words "draw him" by the words "given unto him." What is it that the Father has to give unto him so that he will not draw back and walk no more with Christ?? What is it that Jesus explicitly states is missing in those mentioned in verse 64??? "some of you BELIEVE NOT." The ability to believe savingly unto the end is what is missing and that is what must be "given unto him of the Father." All others have false professions empty of genuine saving faith as that is the "work of God" (v. 29) performed by God WITHIN man. This is the simple and obvious truth of this context. Judas was included in the group of unbelievers. However, Judas continued to walk with Christ in order to fulfill the Old Testament prophesy, not because he was a believer for Christ said he was a "devil" long before his betrayal. To be drawn by Christ in the sense of John 6:44-45 is to be "given" by the Father true saving faith and all that are drawn or given such are raised to eternal life. 44 No man can come to me, except the Father which hath sent me draw him: and I will raise him up at the last day. 45 It is written in the prophets, And they shall be all taught of God. Every man therefore that hath heard, and hath learned of the Father, cometh unto me. Jesus makes it clear that the terms"draw him" in verse 44 is inclusive of something being "given unto him" and what is missing among those listed in John 6:64 is true belief in Christ. Hence, what must be "given unto him" is the ability to believe in Christ.