Answer:
What immortal hand or eye
Could frame thy fearful symmetry?
-To frame here is probably to contain, kind of like putting a picture in a frame. when you frame something, the boundaries are clear and the object isn't going anywhere
- Fearful symmetry" is a very nuanced quality to have. "Fearful" reference the scariness of the tiger, but also alluleds to the sublame. The sublame is an old notion of really big, powerful, mysterious stuff that terrifies us because it's big, powerful and mysterious.
In what distant deeps or skiesBurnt the fire of thine eyes?On what wings dare he aspire?What the hand dare seize the fire
Fire imagery -- both conjures the heat of the furnace in which the tyger was made (God as blacksmith), the fiery colour of the tyger 's eyes, and also hellfire. Another example of a destructive yet beautiful force. Unorthodox image of God as a blacksmith-- a heavy handed workman creation as a brutal process.