The title has been used by the 1998 documentary film about the making of the film To Kill a Mockingbird, but it originally comes from William Blake's 1794 poem The Tyger, which has been called "the most anthologized poem in English". The title comes from the identical 1st and last (6th) stanzas that go,
"Tyger! Tyger! burning bright
In the forests of the night,
What immortal hand or eye
Could frame thy fearful symmetry?"