"Tiger" comes from Song of Experience. Tiger symbolizes a mental state with profound experience of the world, complete self-awareness, strength and beauty.
brief introduction
Blake has realized that with the changes of the times, people's thoughts can no longer stay in the initial "naive" world, but are entering the "experience" world. Blake has a sensitive premonition of people's loss and pain in the future.
Staying in the "naive" world will feel depressed, anxious and desperate, and entering the "experienced" world needs new harmony and order. In order to seek new harmony, Blake created new images through his own poems, and once again "drew innocence from experience".