The above verse is First John 3:21.
The secrets of our hearts, or our deep beliefs, are judged by gospel truth (Rom 2:16). Jesus says we should forsake and repent of all other beliefs other than the gospel (Mark 1:15). Nothing else besides divinely declared gospel reality should have any place in us. Then, “Whatever we ask we receive from Him, because we keep his commandments and do these things that are pleasing in his sight” (I John 3:22). While it is not specifically labeled a command, Mark 1:15 is one, and it was the FIRST command out our Lord’s mouth. I call it ‘the lost command of Jesus.’
Gospel belief empowers us to love the way God intends (I John 3:23). It produces love. Galatians 5:6 speaks of ‘faith working through love.’ If we truly know God’s love experientially, because he first loves us, this produces in us a desire to believe whatever he says (in the New Testament this is Christ’s gospel). If we do, this enables and empowers us to love others the way God wants. The gospel is ‘THE’ power of God (Rom 1:16).
It is synergistic and centrifugal in our lives in so many ways. If our hearts are saturated with gospel truth they don’t condemn us. This gives us total confidence before God, and even “boldness in the day of judgment” (I John 4:17). Plus, it causes us to fall in love with our loving Father more than we could ever imagine.