In the lines 105-107 of "Lines Composed a Few Miles Above Tintern Abbey," the phrase "all the mighty world / Of eye, and ear-both what they half create / And what perceive" suggests that what we perceive is a combination of what our senses (eye and ear) take in and what our inner self or imagination contributes. Therefore, the best statement that captures the meaning of this phrase is:
What we perceive comes half from our senses and half from our imagination or inner self.
This means that our perception of the world is not solely based on what our eyes and ears capture but is also influenced by our thoughts, emotions, memories, and interpretations. It emphasizes the idea that our perception is a blend of sensory input and cognitive processes, shaping how we experience and understand the world around us.