There are plenty of rational arguments for Christianity for those willing to do due diligence:
https://www.thegospelcoalition.org/article/countering-a-dist...
There are plenty of rational arguments for Christianity for those willing to do due diligence:
https://www.thegospelcoalition.org/article/countering-a-dist...
http://www.peterkreeft.com/topics-more/20_arguments-gods-exi...
I've read the Handbook of Christian Apologetics by Kreeft and it tries to make these philosophical topics more accessible to the average reader. There are numerous speakers and writers out there, and you may prefer one of them. For example, Tim Keller is quite different and you can hear him here:
https://gospelinlife.com/downloads/literalism-isn-t-the-bibl...
I've enjoyed reading Dallas Willard:
http://www.dwillard.org/articles/individual/language-being-g...
Here is a better jumping off point :
http://www.veritas.org/how-does-christianity-measure-up/
If you want a very in depth treatment, then:
https://www.amazon.com/Doctrine-Knowledge-God-Theology-Lords...
No there aren't. Faith, by its very definition, is irrational.
But I'm not joining a communist cell just for the comradeship.
Now, the workaround for people who fail to act rationally on their own was to give them a set of heuristics that they could follow to achieve the same effect without too much thinking, a.k.a. religion.
Of course some religions advocate totally irrational things, like human sacrifices or jihad, but some evolved to the point that following their teachings is a net gain for the society.