The Gospel according to Mark shows us Jesus’ call for us to drop everything to follow Jesus, so we can become more like Jesus and do the things that Jesus does.
The Kingdom of God is now expansive. We are empowered through the Holy Spirit to be witnesses just like Peter.
What is your requirement for belief? What does belief mean to you, and what did it mean to John?
Why is there evil in the world? Where does suffering come from? What does suffering look like? What can we do about it?
If we can believe the Bible, what can we do with that? What is our world view?