In “The Tyger”, William Blake not only explores the coexistence of good and evil, but he also questions the source of their existence, asking how a single creator could create both beauty and horror. It includes powerful metaphors and religious and classical allusions.
Juxtaposition is a literary term describing the placement of things near one another. The "things" could be people, places, ideas, objects, moods, motifs, emotions, etc.
"Tyger Tyger, burning bright, / In the forests of the night..."
The poem is a series of repeated questions posed in six regular stanzas. The questions intensify the emotion of the poem, but remain unanswered at the end of the poem.
Who made me?
Who made you?
The inability to answer the speaker's question leads to a theme about humanity's inability to understand the origins of evil in our world.
"The Lamb"
Cheerful and comforting: The speaker describes the lamb's idyllic life and is confident that God is caring for the lamb