Typically something made in the process of making a completely different thing
2. It was extremely embarrassing when my father was accused of corruption.
3. I was deeply embarrassed when I suddenly tripped on the catwalk.
Blake is suggesting that C. sadness overcame the stars.
He is saying that the stars started crying over something, and we usually cry because we are sad or in pain. In this case, the stars and the entire heaven are crying because Satan fell to Hell, when he used to be one of the brightest angels.