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.
Dallas WillardThe command is "Do no work." Just make space. Attend to what is around you. Learn that you don't have to DO to BE. accept the grace of doing nothing. Stay with it until you stop jerking and squirming.
Dallas WillardUnderstanding is the basis of care. What you would take care of you must first understand, whether it be a petunia or a nation.
Dallas WillardHistory has brought us to the point where the Christian message is thought to be essential concerned only with how to deal with sin: with wrongdoing or wrong-being and its effects. Life, our actual existence, is not included in what is now presented as the heart of the Christian message, or it is included only marginally.
Dallas Willard