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What gives life is God's Spirit; human power is of no use at all. The words I have spoken to you bring God's life-giving Spirit.

Yet some of you do not believe.” (Jesus knew from the very beginning who were the ones that would not believe and which one would betray him.) And he added, “This is the very reason I told you that no one can come to me unless the Father makes it possible for him to do so.”
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(John 6.63-65 GNB)

"The Father makes it possible" and to those who are given the possibility, they have the free will whether to believe or not to believe.

And for those who believe, it is then our turn to be the instruments for "the Father to make it possible" for many others.

Let us focus on the words that Jesus had spoken and obey them and follow God's Spirit.