Some people CAN rationalize and discover evidence of their Spiritual beliefs. Biblical Scholars are very intelligent people; I have read their philosophies which are given in an extremely logical manner.
Other people, atheists, have not been able to rationalize anything outside of the earthly realm.
Its all just your outlook on life, and no debate can ever be won on this subject.
Even people like me who have strong spiritual beliefs don't understand how God works. All the great philosophies were based on confusion, and 100% of the time the Philosophers never overcame the confusion.