The real issue relating to exclusiveness is whether or not the Christian actually has a relationship with God, a presence of God, which non-Christians do not have. Apart from Christian spiritual formation as described here, I believe there is little value in claiming exclusiveness for the Christian way.

You can live opposite of what you profess, but you cannot live opposite of what you believe.

Projects of personal transformation rarely succeed by accident, drift, or imposition.

Make disciples. Surround them in the reality of the Trinity in a fellowship of disciples. Teach them to do everything Jesus says.

The cautious faith that never saws off a limb on which it is sitting, never learns that unattached limbs may find strange unaccountable ways of not falling.

A disciple is a person who has decided that the most important thing in their life is to learn how to do what Jesus said to do.

We are unceasing spiritual beings with an eternal destiny in God's great universe.