John the Apostle
John 6:61ESV·traditional attribution

But Jesus, knowing in himself that his disciples were grumbling about this, said to them, “Do you take offense at this?

John Calvin Reformed @genevareformer

61. But Jesus knowing. Christ knew indeed, that the offense which the reprobate had taken up could not be removed; for, to tell the truth, “Pour dire a la verite.” the doctrine does not so much wound them as it exposes the putrid ulcer which they inwardly nourished in their hearts.

Matthew Henry Presbyterian @wholebiblehenry

We have here an account of the effects of Christ's discourse. Some were offended and others edified by it; some driven from him and others brought nearer to him. I. To some it was a savour of death unto death; not only to the Jews, who were professed enemies to him and his doctrine, but even to many of his disciples, such as were disciples...

Commenting on John 6:60-71

John Gill Reformed Baptist @doctorgill

It is the Spirit that quickeneth,.... It is the spirit of man that quickens him; or which being breathed into him, he becomes a living soul; for the body, without the spirit, is dead; it is a lifeless lump: and it is the Spirit of God that quickens dead sinners, by entering into them as the spirit of life, and causing them to live: and...