Invisibility

Invisibility is the state of an object that cannot be seen. An object in this state is said to be invisible (literally, "not visible"). The phenomenon is studied by physics and perceptual psychology.

Quotes
E l'invisibil fa vedere Amore.'' And things invisible are seen by Love.
 * ''Quel che l'huom vede Amor gli fa invisibile
 * Love what we see can from our sight remove,
 * Ludovico Ariosto, Orlando Furioso (1516), Canto I, stanza 56 (tr. John Hoole, 1783)

You're invisible now, you got no secrets to conceal.
 * When you ain't got nothing, you got nothing to lose
 * Bob Dylan, "Like a Rolling Stone" (from Highway 61 Revisited, 1965)