....and what is?

Describe the rainbow to a blind man, Teach a dumb child how to sing. Birds are singing in my heaven, In a world that is but real. So I drown myself in shallow tears All through childhood though to swim. I realise the clock stopped ticking, Giving way for my one swing. How do winding roads and disappearing footprints Lead to castles standing tall? To understand would be everything, But I don't want that, that's not real.