"The Lamb" represents Blake's vision of heaven as an orderly place firmly under God's authority. The speaker of the poem, who we discover in the second stanza is a child, is addressing a lamb and telling the creature that it was created by God. He refers to this creator god as the Lamb, meaning Jesus. The lamb is thus not simply created by God, but is in the image of God.
The lamb is also a symbol of the human child. The child speaker says that he, too, is made in the image of God, because both are called lambs, just as Jesus is:
I a child & thou a lamb,
We are called by his name.
The poem ends with the speaker blessing the lamb.
The poem's theme is the innocence of childhood and the child's unquestioning faith in what he is told about a safe, blessed, and orderly universe. This is a world that is gentle and good, and where God takes cares of his creation. This poem is part of the volume Songs of Innocence.
The poem is best understood in the context of the companion volume to Songs of Innocence, Songs of Experience
and poems such as "The Tyger
." "The Lamb" shows us only the heavenly part of existence, while "The Tyger" raises anguished questions about how God could create such a beautiful but predatory creature as the tiger. "The Lamb" can also be understood in the context of Blake's holistic cosmology, where heaven represented order and authority and hell represented creative chaos and energy.