To start off, I'm not religious. But - I am well into Quantum Theory and firmly believe that not everything in the world can be explained by linear, Newtonian thought.
We're an infinitesimally small part of universal existence, and just because something can't be measured, doesn't mean it doesn't exist.
Think back to what the 'experts knew' when you were at school. In hindsight, much or most of it has been debunked and/or updated. So - what we 'know' now will most certainly be outdated in a similar or even less timeframe.