Invisible - puzzling puzzle
![difficulty](http://www.nuin.nl/rdzl/assets/images/star_yellow.png)
"I never was, am always to be,
No one ever saw me, nor ever will
And yet I am the confidence of all
To live and breathe on this terrestrial ball."
No one ever saw me, nor ever will
And yet I am the confidence of all
To live and breathe on this terrestrial ball."