Once again, this poster addresses me and not the topic.The text, and the context, does not make your argument. I see you snipped out the Bible. You have to snip out the Bible if you are going to hold your view.
Stop snipping out the rest of John 6.
1) The idea based on the context of John 6:65 is a person cannot come to faith in Christ, unless God allows him or her to believe. Thus if God has chosen to harden a person's heart, as depicted in Romans 11, then that person cannot come to Jesus.
Some of Christ's followers actually did not believe Christ was the Messiah, and Jesus knew who did not believe, whether able to or not, and who would betray Him and was not able to believe because He had been hardened to be the "betrayer."
Thus no one can come to faith in Christ unless:
(a) they have not hardened their hearts like soil #1 in Matthew 13, and
(b) they have not been hardened by God for His purpose as in Romans 11, and
(c) God has revealed the Gospel through His witnesses and hey were receptive and open to good news of the gospel. Recall that some receive the gospel with joy, but no deep commitment, and others also receive the gospel but do not make Christ the overriding priority of their lives. Thus no one can come to Christ unless it has been granted or allowed by our sovereign God.
2) So anyone not blocked from believing can believe in Christ.
3) No one said or suggested anyone needs "advanced faithfulness" to trust in Christ. However, if a person's faith is not deeply rooted, i.e. not superficial, or the person's faith does not make Christ their overriding priority, it is unlikely God will credit their "faith" as righteousness.