The ground of belief

Where lies the foundation of reason? Is it not in something altogether irrational? Reason by itself cannot prove the validity of itself and without itself it cannot prove its validity without undermining it.

Everyday situations can be made extraordinary with the method of excessive examination:

'Where are you going?'
'Upstairs'
'Why?'
'Because I'm going to lie down and rest for a while in my room'
'Why are you going to rest awhile?'
'Because after stressful days like this one I like to have some peace and quiet'
'Why do you like peace and quiet?'

Haven't we hit the wall? Haven't we?!! This method can be applied to the foundation of our beliefs and to something yet more basic and animal- our actions. Aren't political, moral, and social beliefs and actions of this sort?

Imagine the following:

'Abortion is vile and despicable. How could a mother purpose to destroy life- life which she created? Man is lost when he places his cold grip on God's mantle'
'This is powerful and evocative imagery. But where is the argument? Why is abortion wrong?'
'Abortion is wrong because it involves the killing of an innocent human being.'
'Why is it wrong to kill an innocent human being?'

We have hit the foundation, the root, the great rock upon which is built the grand edifice of moral feeling. How can one answer the final question? Should we dare try?