“I cannot imagine how the clockwork of the universe can exist without a clockmaker. ”

“I cannot imagine life without books any more than I can imagine life without breathing.”

“You cannot imagine how wearisome existence grows, alone and immortal.”

“I cannot imagine a world without music. It would be... well, I cannot imagine it.”

“What you are to do without me I cannot imagine.”

“I find I cannot exist without Poetry”

“… in an infinite universe, anything that could be imagined might somewhere exist.”

“Life cannot exist without a certain conformity to the surrounding universe — that conformity involves a certain amount of happiness in excess of pain. In short, as we live we are paid for living.”

“Dialogue cannot exist without humility.”

“Duty cannot exist without faith.”