The Known is the Unknown
There is a difference between scientific knowledge and emotional understanding. We 'know' the galaxy in which we live is 100,000 light years across, we 'know' that atoms are made up of largely empty space, we 'know' we only see within that narrow band of the electro-magnetic spectrum we call "visible light", but how much of that is something we emotionally, intuitively accept? Something that we believe we understand can still be full of mystery, still surprise or shock us. Known things can still, essentially, be unknown.