The invisibility I seek is expressed well by the Piper at the Gates of Dawn
as quoted by Ratty in The Wind in the Willows:
"Let me try and give you them," said the Rat softly, his eyes closed.
"Now it is turning into words again
faint but clear
'Lest the awe should dwell
And turn your frolic to fret
you shall look upon my power in the helping hour
But then you shall forget!
'Lest limb be reddened and rent
I spring the trap that is set
As I loose the snare you may glimpse me there
For surely you shall forget…
Helper and healer, I cheer
Small waifs in the woodland wet
Strays I find in it, wounds I bind in it
bidding them all forget."
– Kenneth Grahame
The Wind in the Willows