Most certainly, I tell you, he who believes in me has eternal life.
Christ let them question Him freely, no small condescension. The wise teacher listens swiftly and turns even foolish questions toward what profits. These Galileans asking "What shall we do?" show a teachable mind, unlike the Judean critics who came only to cavil. He answers the sincere request, not the impertinent quibble.
AI summary
Commenting on John 6:28-59
He that believeth, &c.--(See on Joh 3:36; Joh 5:24).
47. He who believeth in me. This is an explanation of the former statement. For we are taught by these words that it is when we believe in Christ that God is made known to us; for then do we begin to see, as in a mirror, or as in a bright and lively image, God who was formerly invisible.