The Gospel continues with Jesus talking about his sheep. People ask him How long will you keep us in suspense? If you are the Messiah, tell us plainly. Jesus had been telling them he is the Messiah. Which is why he said I have told you and you do not believe. Why would people not believe what Jesus say, even if Jesus has clearly told them he is Messiah. Jesus answers this question when he said because you do not belong to my sheep. My sheep hear my voice. I know them and they follow me.
People choose not to listen to the voice of Jesus because they do not belong to him. When we choose not to listen to Jesus, we reject him and of course, will not follow him. When this happens, we lose eternal life. It is not Jesus who loses when we do not listen to him. People choose to reject Jesus because their expectations of Jesus are different from the real Jesus. They want Jesus to conform to them instead of them accepting Jesus as he is.
The Hellenists in the First Reading heard the proclamation about the Lord Jesus. They believe and turned to the Lord. Jerusalem heard this and they sent Barnabas who encouraged them to remain faithful to the Lord with steadfast devotion. This is what it means to hear the voice of Jesus and follow him. It is to be faithful with steadfast devotion. We cannot decide to believe in Jesus, not on our own terms, but according to the terms of Jesus and what has been taught by the Apostles.
Believing Jesus goes more than intellectual consent. It is trusting in Jesus that leads to obedience. Obedience is proof that our faith in Jesus is real.
Lord, teach me to trust you and accept you as you are.