26 Jesus answered them and said, “Truly, truly, I say to you, you seek Me, not because you saw signs, but because you ate of the loaves and were filled. 27 Do not work for the food which perishes, but for the food which endures to eternal life, which the Son of Man will give to you, for on Him the Father, God, has set His seal.” 28 Therefore they said to Him, “What shall we do, so that we may work the works of God?” 29 Jesus answered and said to them, “This is the work of God, that you believe in Him whom He has sent.” 30 So they said to Him, “What then do You do for a sign, so that we may see, and believe You? What work do You perform? John 6:26-30 NASB
Jesus begins by pointing out to the crowds that they followed him because he fed them. Jesus admonishes them to not to work for temporal food but to work for eternal food. Later he will describe himself as that food.
Jesus seems to be saying that they can have spiritual life through their efforts – their work. But Jesus goes on to say that the work he speaks of is faith. They must believe in him.
The crowd understands that believing [though it is a verb] is not an action. They understand that believing in Jesus implies that he does the work. So they ask what works Jesus will do to prompt their faith in him.
Is Jesus telling us that faith is work? No. Paul makes the distinction clear in Ephesians 2:9 [we are saved by grace through faith – not of works] and James makes the distinction clear in James 2:20 [faith without works is useless].
So how can we understand this? The crowds understood him – that he was putting quotes around the word work. Jesus was saying that the “work” is to believe.
We too must recognize that there are no works that we can do to attain spiritual life – there is nothing we can do but believe in the work that Jesus did – on the cross.
– SSXG