Arguments from natural theology are at times needed when Christians defend the faith against atheological attacks. Yet, for the Christian, such apologetic maneuvers are not required in and of themselves, for Christians know that they are not in a relationship with a force or an abstract superlative entity devised by human adroitness. No, Christians heed the sensus divinitatis and the confirmatory evidence that God provides to those who love him. It is no wonder CS Lewis wrote about the obstinacy of belief.
Lewis and Alvin C. Plantinga have taken on evidentialism and shown that she is found wanting when judged by her own standard. Both thinkers show that Christians are in a relationship with the Most High that no one can cause them to easily doubt. Christians are thus rightly obstinate in their theistic beliefs, even in the face of supposed contrary evidence that could deceive if possible, even the elect.
Just as a man does not doubt the existence of his wife or his children, just as a wife does not question the existence of the mate that she lives with, eats dinner with, and has loving relations with--so the Christian, being in an intimate relationship with Almighty God, does not doubt God's existence (even when the way gets rough). We thus conclude with these sagacious words from Lewis:
"To believe that God--at least this God--exists is to believe that you as a person now stand in the presence of God as a Person . . . You are no longer faced with an argument which demands your assent, but with a Person who demands your confidence" (OB, 26).
Duns the Scot