English is not my native language, so have mercy about grammatical issues. However my friends says my language is nice, you should so if you are a friend.
My religious concepts felt apart a while before I started to acquire facts against religion. What held me in this imaginary world, was a thought that I'm doing the right thing - believing. Any arguments against Christianity would not work. I know I don't know everything and nobody does, but what I do know is my truth. Scientific arguments were only temporary notions that eventually shall be replaced with God. So scientists are on the right way, but not to be taken too seriously unless they find God. This is how I was thinking.
If we remove religion from the scene, what we would put instead? In many different conversations as an alternative has been offered art, literature, music and so on. These are first things coming in mind that like religion are irrational. Another alternative is science. Science is rational and like religion it makes claims about who we are, how we are and how to be.
There is situations like suffer, loss of loved ones, feel of guilt and other things (full list is available in your experience) when you can't change the circumstances to make reality a bit more convenient and we can fall into temptation to desire an irrational reality. Therefore we would need something that claims and is irrational. It does mean partly or fully to avoid facing consequences of some unwanted events, but, if they are not changeable, who cares about objectivity? Irrational reality gives a feeling that there is something else like other chance, higher will, higher meaning and then even suffer itself becomes a proof of your belief.
When I lost my faith, it was easier to breath. Nobody was looking at me in shower and I didn't have to confirm every my thought with my understanding of Gods will. But there is situations when you can't do anything to improve situation. When you wait, for example. Miserable. In these cases prayer gives that feeling that you're doing at least something, even if useless, but something. Now it's gone for me and I miss it, but for many people this gap can't be empty. And this gap between reality and irrationality for them will be a good reason to deny a rational reason.
Tell me lies, tell me sweet little lies, isn't that song about the same in some sense? Religion may be a comfortable sofa where you relax when tired and then can't get up to live on, but life is short and living for another chance is so much easier than stand on your feet and do what you have to. Our brains are just a tangle of nerves and nerves are designed to make us feel. How can we be then completely rational?