Symbolism is used in poems to express mystic ideas and emotions.
Explanation:
In Tiger, Blake is puzzled when he first saw the tiger at night. He asks a series of questions about its fierce appearance and the creator who made it.
It refers to symbolic myths about human life and society. It also compares the fierce condition of the tiger to that of a human being and explains the supreme power.
Blake compares the lamb and the tiger. The lamb symbolizes good character, innocence and purity but the tiger symbolizes danger and fierceness.