Truth and the yawning chasm we feel betwen self and the world

Michael Steinberg argues in the Fiction of a Thinkable World "...that the yawning chasm we feel between self and the world is an artifact of 
Christianisation, as convincing as it is unreal - for behind it the incessant transformation of our lives continue unseen."


What does this unseen truth purport that infiltrates our lives?


It puts forward, and this has been ever present since Plato's Cave and Forms,  the theory that there is a yawning chasm between you and the real truth. 
For those who go along with this, belief that you know the real truth is dangerous, for as technology and science advance we may find the real truth isn't the truth at all.  
Steinberg argues that "...we are long past the time when we should have recognised that our claim to possess (the truth) expired...with the literal belief in the doctrines of Christianity." 
Steinberg claims that "Christian thinking is otherworlly because its explanatory structure demands the existence of another world to give this one significance."


But how has this orphan of belief survived its theological parentage? For Steinberg, its staying power "...derives from the surprising alliance between Christianity and pagan philosophy."