The author uses the word integrity in "this integrity, when you understand what you feel and you hear with an understanding heart, is the mark of an educated person" (lines 122–124) to mean *

The word integrity in this phrase, is meant to mean an acceptance and understanding of humility. The importance of balancing one's own knowledge and understanding of the world, the internal, with that of the outside world and interactions with other individuals, the external.

‘the resulting drop in pressure would be detected by the soviets.’

This one might be 1 hope