S – What can we do to perform the works of God?” they asked. 

²⁹ Jesus replied, “This is the work of God—that you believe in the one he has sent.” 

John 6:28–29 CSB

O – Commentary:

The people recognized that Jesus was saying God had a requirement for them. They would do God’s requirement if He would inform them what it was. They believed that they could please God and thus obtain eternal life by doing good works (cf. Rom. 10:2–4).

6:29. Jesus’ response to their question was a flat contradiction of their thinking. They could not please God by doing good works. There is only one work of God, that is, one thing God requires. They need to put their trust in the One the Father has sent. Because of their sin people cannot please God by doing good works for salvation (Eph. 2:8–9; Titus 3:5). God demands that people recognize their inability to save themselves and receive His gift

“John,” in The Bible Knowledge Commentary: An Exposition of the Scriptures

A – Could it be that simple – believer in the one who God sent?  Yes! And it is true today.  Salvation comes when someone believe that Jesus Christ can save them from their sins and is the bridge to a relationship with God.  People think they need to “do” more to be godly.  Instead, God is more about “being” in relationship with him.  

R – Heavenly Father, you alone are the one, true God.  Salvation come in believing that Jesus is our Lord and Savior.  Empower us to confident in that action as the way to you.  Our other actions should come from a desire to know you more.