Theists - I want to know what you think

[Edwardo Piet]

A belief system can be reasonable without being rational.

At face that's a contradiction so you're going to have to justify it.

I mean, if a belief can be reasonable without being rational can it also be rational without being reasonable? What's the difference?

My position is that there is no certain basis on which any belief system rest and yet the human condition requires each of us to have beliefs that rest, either tacitly or explicitly, on some freely adopted intellectual assumptions.

This makes you sound like a presuppositionalist. It makes you sound like you are saying that you think the most fundamental premises for any worldview is ultimately entirely irrational. It makes it sound like you're saying that theism isn't based on reason but atheism isn't either.

My biggest problem with the idea that belief in God doesn't require being reasoned to is the fact that you have to define God before you even know what you're believing in... and it's not possible to define things without reason. Belief in God is surely either reasoned to poorly or reasoned to successfully. In my experience it always seems to be the former and never the latter.