Authors:

Sheldon Vanauken wrote that the strongest argument for Christianity is Christians, when they are drawing life from God. The strongest argument against Christianity? Also Christians, when they become exclusive, self-righteous, and complacent.

John Ortberg (1997). “The Life You've Always Wanted: Spiritual Disciplines for Ordinary People”, p.38, Harper Collins
Sheldon Vanauken wrote that the strongest argument for Christianity is Christians, when they are drawing life from God. The strongest argument against Christianity? Also Christians, when they become exclusive,