Final answer:
Dillard is suggesting that witnessing a total eclipse can cause a temporary disconnection from personal identity and the physical world, requiring a conscious effort to restore it.
Step-by-step explanation:
In the given quote, Dillard is suggesting that the experience of witnessing a total eclipse is so disorienting that it temporarily severs our connection to our personal identity and our place in the physical world.
The phrase 'Only an extraordinary act of will could recall to us our former, living selves and our contexts in matter and time' implies that it takes a conscious effort to restore our sense of self and our connection to the material world after such a transformative event.