Bread from Heaven

Why do they bring up manna again in John 6:31?
Either they have completely forgotten the fact that Jesus had fed them and thousands of others just the day before, which makes no sense since they had chased after Jesus to Capernaum because of it, or they are telling Him that if He wants them to believe that He is the Prophet, He will have to do the other thing that Moses did for the Israelites.

Which is what?
Free them from the bondage of pagans, from Rome this time. This was their agenda from the beginning when they plotted to take Jesus by force, crown Him king, and have Him lead an uprising against the Romans, and they are dropping strong hints that they want Him to meet their understanding of “the Prophet” Moses had prophesied about.

What does Jesus do in John 6:32?
He starts by clarifying that it wasn't Moses who had given them “the bread from heaven.” But then, instead of saying that God had given manna, Jesus swings the conversation from the physical to the spiritual realm and declares Himself the true bread from heaven: “My Father gives you the true bread from heaven. For the bread of God is He who comes down from heaven and gives life to the world.” (John 6:32-33).

Do they understand Jesus' declaration in John 6:32-33?
No, they still see Jesus not as the spiritual bread from heaven but as the giver - “Lord, give us this bread always” (John 6:34) - of physical bread.

So what does Jesus do?
He explicitly identifies Himself as the bread: Jesus said to them, “I am the bread of life” (John 6:35).

What kind of "life"?
Everlasting (see I Am the Bread of Life).

What does Jesus mean by "comes to Me" (John 6:35)?
It means coming to Him spiritually to receive everlasting life - i.e., salvation.

What kind of “hunger and ... thirst” (John 6:35) is Jesus talking about?
Spiritual.

Christians still suffer, so how can Jesus say that those who comes to Him shall never hunger and thirst spiritually?
True Christians who suffer for Christ should rejoice as Jesus' disciples did: “So they departed from the presence of the Sanhedrin, rejoicing that they had been counted worthy to be treated shamefully for His name” (Acts 5:41). And if we are killed for our faith in Christ, the heavenly phase of our everlasting life starts and puts all suffering on earth, which is temporary, in its proper perspective: “For I consider that the sufferings of this present time are not worthy to be compared with the glory that is to be revealed to us” (Romans 8:18). Christians who truly believe in Jesus never lack spiritually, for the rest of eternity in heaven with Him is infinitely more than enough.

What kind of hunger and thirst do the people Jesus is addressing above, as well as many people in church buildings today, focus on?
Physical.

What did Jesus say about the people who focus on that?
They “do not believe” (John 6:36) in Him.