Dear Rhiannon,
Spiritual, connected ness, they are feelings but as Shaker points out we are all unique, so the joy we feel might be different but we all felt joy, in that one moment we all felt joy, that's the connection.
And on thinking, if you want to analyse it, we could have found lots of connections, the sound of the fiddle, the buzz in the pub, there would probably have been lots of feelings that we had in common.
I don't think I am saying anything controversial, if someone describes a moment of joy, others can relate, I have heard it so many times, "yes I know exactly what you are talking about".
Gonnagle.