John 6:34-40 — Then said they unto Him, Lord, evermore give us this bread.
And Jesus said unto them, I am the bread of life: he that cometh to Me shall never hunger; and he that believeth on Me shall never thirst.
But I said unto you, That ye also have seen Me, and believe not.
All that the Father giveth Me shall come to Me; and him that cometh to Me I will in no wise cast out.
For I came down from heaven, not to do Mine own will, but the will of Him that sent Me.
And this is the Father's will which hath sent Me, that of all which He hath given Me I should lose nothing, but should raise it up again at the last day.
And this is the will of Him that sent Me, that every one which seeth the Son, and believeth on Him, may have everlasting life: and I will raise him up at the last day.
Give us this bread — They wanted physical satisfaction, like the woman at the well (John 4:15).
Come and believe mean essentially the same thing — the soul trusts Christ. But without faith it is impossible to please Him: for he that cometh to God must believe that He is, and that He is a rewarder of them that diligently seek Him (Hebrews 11:6). Come – heart: believe – head.
never hunger, never thirst = "nowise" — in the sense of assurance of salvation. He is sufficient. We don't always take advantage.
Jesus knew, however, that they didn't believe. He goes on to explain who will believe.
In John 5:21, the Son quickens whom the Son wills. Here (6:38), the Son receives thos the Father sends. So, our security doesn't rest on anything in us or from us, but upon the Father's choice and the son's love. Eternal predestination guarantees eternal preservation.
I will no wise cast out — He will never expel anyone who has come. It's true that Christ won't reject any who trust Him, but this verse refers to His keeping all who have already come.
All (that the Father gives) = everything. Not individuals (the tense is neutral). This refers to the company of the elect. As a group, we are given to the Son by the Father. According as He hath chosen us in Him before the foundation of the world, that we should be holy and without blame before Him in love (Ephesians 1:4).
All are invited and those who do come are received. Here (the second half of verse 37) it is referring to individuals.
Verse 39 — "all that" and "it" — neutral singular, again referring to a group.
Verse 40 — "everyone," "him" — referring to the individual.