George I. MavrodesThe failure . . . of one person to apprehend God has very little significance against someone else's positive claim. For it is quite possible that the failure stems from the fact that the man is in some way yet unready for that experience, or from the fact that God—for reasons which we may or may not guess—has not yet chosen to reveal Himself to him.

(George I. Mavrodes, Belief in God: A Study in the Epistemology of Religion [Washington, DC: University Press of America, 1970], 79)