Life of Pi and how to believe I for myself consider myself an agnostic. Because i simply dont know, but i dont reject. My girlfriend on the other hand is a firm believer and we both watched The life of Pi yesterday.

Maybe because my girlfriend would wish it for me, altough she does in no way pressure me, i really consider faith and would like to believe. BUT i dont want to lie to myself and want to really believe to believe like she does, unshakeable. 
But because i grew up in a very non christian or religios house i struggle to "disregard" logic to believe. I simply would like the comfort of god, the thought of seeing all my loved ones in heaven after death etc. Having someone to thank for evrything good. But logic always denies this for me. 

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In the movie two storys are told. The story of the tiger, the fantastic beautiful story, and the grey realistic story with just people, and in the end he askes the other guy which he would prefer and like more. And says that it is like that with god.

But i feel and interpretations i read about the movie also say things like.


  The logical, gray and uncharming reality which is depicted as being bland and destroying every sense of magic in the world. And the godly, faithful and beatiful reality which is ultimately possibly self-deception


But does it have to be like that? Does one have to practice self-deception and discard all logic to believe. Or is there a side where the logical reality and the beatiful faith can coexist.

I really struggle here and cannot find a way out. And maybe I am way to indoctrinated with logic, and realism and science to simply JUST BELIEVE but i would like to try to give my life more meaning than to simply die and thats it.

So my question is:

Does someone who has believed in reason, logic and pure science his whole life need to discard this in order to believe or is there a way for both to coexist and give meaning to a (maybe way too) critical thinking mind.
Faith and reason do not contradict each other any more than science and the Bible do.
Science teaches us about physical realities and the Bible about spiritual truth.  Science can't prove or disprove the existence of a soul and the Revelation doesn't hinge on its literal interpretation.  But unlike these two domains, faith and reason actually help each other out, especially on ones quest toward their final end in Jesus.

Faith and reason are like two wings on which the human spirit rises to the contemplation of truth; and God has placed in the human heart a desire to know the truth—in a word, to know himself—so that, by knowing and loving God, men and women may also come to the fullness of truth about themselves
St. John Paul II - Fides et Ratio

In Life of Pi, the movie at least, leaves a viewer a little off in their conception of faith and reason because you might have to abandon reason to simultaneously be Hindu, Muslim and Catholic

But, while it features a positive treatment of Catholicism and a sympathetic priest, this visually artful psychological parable -- told in flashbacks by its now-adult protagonist (Irrfan Khan) -- upholds its main character's view that he can be, simultaneously, a Hindu, a Christian and a Muslim. Not for the impressionable or the poorly catechized.
USCCB Movie Reviews

So it's not the best introduction to the way Christianity is meant to be lived, for that one should get to know the saints. Like St. Joan of Arc, St. Maximillian Kolbe, St. Thomas More or St. Thérèse of Lisieux.

we are greatly helped not only by theological investigation but also by that great heritage which is the &quot;lived theology&quot; of the saints. The saints offer us precious insights which enable us to understand more easily the intuition of faith, thanks to the special enlightenment which some of them have received from the Holy Spirit, or even through their personal experience of those terrible states of trial which the mystical tradition describes as the &quot;dark night&quot;.
St. John Paul II - Novo Millennio Ineunte

Specifically with the &quot;that is what it is like with God,&quot; that is a terrible horrible deception.  Jesus Christ is the King of the Universe not its mascot.  There's a lot of well meaning Christians and non-Christians who take Life of Pi or The Shack as representative of Christianity, but they're just the works of individuals, not sanctioned by any Church.  The truths may resonate with the Faithful and the Catechized, but there are truths in Homer and Marx too*. It's not even necessary for Catholics to take to heart and believe all that the Saints have written.
But, back to faith and reason.  It is possible to prove the existence of God through reason.  I'm not sure if all Christianity believes this to be the case, but Catholics, like Pi, ought to.
St. Thomas Aquinas sought to do this 800 years ago with his 5 proofs.  But it's not the best way to come to know God. All Christians believe that the best way to come to know God is through meditating on the Life of Christ. Reading the Gospels and trying to do what Jesus says are the greatest commandments, Love God and Love your Neighbor.
*Simpson and Groucho at least