If I affirm myself as a Catholic merely by denying all that is Muslim, Jewish, Protestant, Hindu, Buddhist, etc., in the end I will find that there is not much left for me to affirm as a Catholic, and certainly no breath of the Spirit with which to affirm it.

Thomas Merton, The Thomas Merton Encyclopedia by William H. Shannon, editor, Christine M. Bochen, editor, Patrick F. O'Connell, editor