Reaction to Ignorance

I think that the main message in Ignorance is that Larkin feels there is a certain pressure in society to conform to identifying what your religious beliefs are, even when we can never be sure whether there is a God or not. 

'Strange to no nothing' never to be sure

Of what is true or right or real

But forced to qualify or so I feel.' 

I think Larkin is here asking the question of, how can make a decision on our religious beliefs when we actually don't really know anything about God ourselves.