Robert Helps,
Piano guru

There is that in me - I do not know what it is - but I know it is in me.
Wrenched and sweaty - calm and cool then my body becomes, I sleep - I sleep long.
I do not know it - it is without name - it is a word unsaid,
It is not in any dictionary, utterance, symbol.
Something it swings on more than the earth I swing on,
To it the creation is the friend whose embracing awakes me.
Perhaps I might tell more. Outlines! I plead for my brothers and sisters.
Do you see O my brothers and sisters?
It is not chaos or death - it is form, union, plan - it is eternal life - it is Happiness.

Walt Whitman, Song of Myself, 50