28 Therefore they said to Him, “What shall we do, so that we may work the works of God?” (John 6:28 NASB)
The flesh is still with us all, even those who have been born again unto eternal life. The flesh does not understand grace. The flesh does not understand the relationship to the Christian being born again unto good works (Ephesians 2:10). Therefore, the visible church is ripe with false teaching at this time that emphasizes all the wrong things, and, coupled with rampant Biblical illiteracy, most professing Christians are like those Jesus was confronting in John 6 who could not conceive what our Lord boldly told them in vv35-40 that belief and salvation was a gift from God not something earned or deserved.