The False Argument of Faith
A lot of good points everyone's making; I hope I can add a couple more.
In the spirit of arguing against old worn-out paradigm's I submit the following.
1. This business about a belief in unicorns is a red herring. Unicorns may in fact exist in another world. The absurdity of unicorns is no less absurd than our own conscious existence that cannot be logically explained. Cognitive science says consciousness operates together in an illogical manner (conscious and subconscious cognitive abilities). How do we square that circle?
2. In Christianity, Jesus had a consciousness. His consciousness is assumed to be irrational, just like our consciousness. Dying for someone else, is irrational. Love can be irrational. Any metaphysical phenomenon is considered outside of the domains of logical existence. This is one reason why Christianity is so relatable. It's not solely an a priori logical concept. It's also partly an a posteriori irrational experience. A phenomenon.
My point is that rather than fear the irrational, one should embrace the irrational as evidence in support of their personal relationship in the Christian faith.
If the non- believer or skeptic wants to argue that all of life is rational, that their own conscious existence is rational, and that the world ex-nihilo can be completely explained rationally with no mystery or paradox, ironically, it will only serve to diminish their case in support of any alternative rational belief system. As if irrationality could or does not exist. Ask the skeptic if he/she can rationally explain their own existence. If they can't (which we know they can't) then where's their argument?
In the end, the concept of Faith has, of course, other secular or rational/irrational implications. Faith in one's abilities, faith in one's employees, faith in one's creativity, faith in one's loved ones...
But what is the concept of rationality and pure reason? What is it's sole purpose? Does it explain everything? Why did Kant conceive of the Critique of Pure Reason? What is abstract metaphysical phenomena? And finally, someone explain consciousness!