There is a passage in the work of the contemporary novelist Dorothy Allison which may help explain what I have in mind. Towards the beginning of a remarkable essay called 'Believing in Literature', Allison says that 'literature, and my own dream of writing, has shaped my own system of belief - a kind of atheist's religion ... the backbone of my convictions has been a belief in the progress of human society as demonstrated in its fiction'. She ends the essay as follows:

There is a place where we are always alone with our own mortality, where we must simply have something greater than ourselves to hold onto - God or history or politics or literature or a belief in the healing power of love, or even righteous anger. Sometimes I think they are all the same. A reason to believe, a way to take the world by the throat and insist that there is more to this life than we have ever imagined.

What I like best about this passage is Allison's suggestion that all these may be the same, that it does not greatly matter whether we state our reason to believe - our insistence that some or all finite, mortal humans can be far more than they have yet become - in religious, political, philosophical, literary, sexual or familial terms. What matters is the insistence itself - the romance, the ability to experience overpowering hope, or faith, or love (or, sometimes, rage).

What is distinctive about this state is that it carries us beyond
argument, because beyond presendy used language. It thereby carries
us beyond the imagination of the present age of the world. [...]

In past ages of the world, things were so bad that 'a reason to
believe, a way to take the world by the throat' was hard to get except
by looking to a power not ourselves. In those days, there was little
choice but to sacrifice the intellect in order to grasp hold of the
premises of practical syllogisms - premises concerning the after-death
consequences of baptism, pilgrimage or participation in holy wars. To
be imaginative and to be religious, in those dark times, came to almost
the same thing - for this world was too wretched to lift up the heart.
But things are different now, because of human beings' gradual success
in making their lives, and their world, less wretched. Nonreligious
forms of romance have flourished - if only in those lucky parts of the
world where wealth, leisure, literacy and democracy have worked
together to prolong our lives and fill our libraries. Now the things of
this world are, for some lucky people, so welcome that they do not
have to look beyond nature to the supernatural, and beyond life to
an afterlife, but only beyond the human past to the human future.