“Great mysteries inhabit the threshold of my being.”
“The greatest riddle of all.... the riddle of man! The complex mystery of the universal human being as he stands wihtin the threshold of universal laws. This is the most fascinating puzzle!”
“I have gone to great lengths to expand my threshold of pain.”
“I have an extremely low threshold for disorder; it offends my very being.”
“I'd gone so far past my fear threshold, I'd completely given up on being afraid”
“There is every reason to think that in the coming years Mars and its mysteries will become increasingly familiar to the inhabitants of the Planet Earth.”