28 Then they said to him, “What must we do, to be doing the works of God?” 29 Jesus answered them, “This is the work of God, that you believe in him whom he has sent.” 30 So they said to him, “Then what sign do you do, that we may see and believe you? What work do you perform? 31 Our fathers ate the manna in the wilderness; as it is written, ‘He gave them bread from heaven to eat.’” 32 Jesus then said to them, “Truly, truly, I say to you, it was not Moses who gave you the bread from heaven, but my Father gives you the true bread from heaven. 33 For the bread of God is he who comes down from heaven and gives life to the world.” 34 They said to him, “Sir, give us this bread always.”
28 Sinabi nila sa kanya, “Ano ang kailangan naming gawin upang aming magawa ang mga gawa ng Diyos?”29 Sumagot si Jesus sa kanila, “Ito ang gawa ng Diyos na inyong sampalatayanan ang kanyang sinugo.” 30 Sinabi naman nila sa kanya, “Ano ngayon ang tanda na iyong ginagawa na aming makikita upang sumampalataya kami sa iyo? Ano ang iyong ginagawa? 31 Ang aming mga ninuno ay kumain ng manna sa ilang, gaya ng nasusulat, ‘Kanyang binigyan sila ng tinapay na galing sa langit upang kanilang makain.’” 32 Kaya't sinabi sa kanila ni Jesus, “Katotohanang sinasabi ko sa inyo, hindi si Moises ang nagbigay sa inyo ng tinapay na galing sa langit kundi ang aking Ama ang nagbibigay sa inyo ng tunay na tinapay na galing sa langit. 33 Sapagkat ang tinapay ng Diyos ay ang bumababang mula sa langit at nagbibigay ng buhay sa sanlibutan. 34 Sinabi nila sa kanila, “Panginoon, lagi mo kaming bigyan ng tinapay na ito.”
THE TRUE BREAD FROM HEAVEN
After being told to work for the imperishable food, the people ask a question, “What must we do, to be doing the works of God?” This echoes their preoccupation with rituals, works, and traditions (Rom 10:2–4). Man has the propensity to believe that there is no merit a person could receive without his efforts. But, to work for our salvation is a fallacy.
But, salvation is not earned by any particular good deed. Jesus answered them, “This is the work of God, that you believe in him whom he has sent.” "The work of God," in this context, is merely a restating what the crowd has said. Instead of works, Jesus says, salvation is based on belief, in the ‘One whom God has sent’, that is Himself.
They refused to believe but had asked for more signs indignantly. They challenged Him by asking, “Then what sign do you do, that we may see and believe you? What work do you perform? Our fathers ate the manna in the wilderness; as it is written, ‘He gave them bread from heaven to eat.’” This was ridiculous for them to demand a miraculous proof—when it was Jesus' miracles which led them to follow Him in the first place!
Most skeptics today are of the same mindset. He who says, "I will believe if God shows me this or that miracle" is, actually, fooling himself not God (Matt 16:4). He who does not wish to believe, prior to a miracle, will not believe, even after a miracle. Saving faith is based on acceptance of God's truth alone, not on any spectacle or emotion. Those who demand a miracle, when they've already been shown ample truth, prove only that they're not really interested in truth, at all (John 6:36).
Moreover, they invoke the provision of bread, in the form of manna, when Israel was in the wilderness under Moses, who they thought was the giver of bread. He was not but God. Their challenge was that Jesus ought to do something more spectacular than Moses if He is to claim to have more authority than the great law giver.