John 6:28-45, 65

Then they asked Him, “What are we to do, so that we may habitually be doing the works of God?” Jesus answered, “This is the work of God: that you believe [adhere to, trust in, rely on, and have faith] in the One whom He has sent.” So they said to Him, “What sign (attesting miracle) will You do that we may see it and believe You? What [supernatural] work will You do [as proof]? Our fathers ate the manna in the wilderness; as it is written [in Scripture], ‘HE GAVE THEM BREAD OUT OF HEAVEN TO EAT.’ ” [Ex 16:15; Neh 9:15; Ps 78:24] Then Jesus said to them, “I assure you and most solemnly say to you, it is not Moses who has given you the bread out of heaven, but it is My Father who gives you the true bread out of heaven. For the Bread of God is He who comes down out of heaven, and gives life to the world.” Then they said to Him, “Lord, always give us this bread.” Jesus replied to them, “I am the Bread of Life. The one who comes to Me will never be hungry, and the one who believes in Me [as Savior] will never be thirsty [for that one will be sustained spiritually]. But as I told you, you have seen Me and still you do not believe. All that My Father gives Me will come to Me; and the one who comes to Me I will most certainly not cast out [I will never, never reject anyone who follows Me]. For I have come down from heaven, not to do My own will, but to do the will of Him who sent Me. This is the will of Him who sent Me, that of all that He has given Me I lose nothing, but that I [give new life and] raise it up at the last day. For this is My Father’s will and purpose, that everyone who sees the Son and believes in Him [as Savior] will have eternal life, and I will raise him up [from the dead] on the last day.” Now the Jews murmured and found fault with Him because He said, “I am the Bread that came down out of heaven.” They kept saying, “Is this not Jesus, the son of Joseph, whose father and mother we know? How does He now [have the arrogance to] say, ‘I have come down out of heaven’?” So Jesus answered, “Stop murmuring among yourselves. No one can come to Me unless the Father who sent Me draws him [giving him the desire to come to Me]; and I will raise him up [from the dead] on the last day. It is written in the prophets, ‘AND THEY WILL ALL BE TAUGHT OF GOD.’ Everyone who has listened to and learned from the Father, comes to Me. [Is 54:13]

And He was saying, “This is the reason why I have told you that no one can come to Me unless it has been granted him [that is, unless he is enabled to do so] by the Father.”