Famous quotes containing the words zone and/or material:
“The human race is a zone of living things that should be defined by tracing its confines.”
—Italo Calvino (1923–1985)
“I do not deny the existence of material substance merely because I have no notion of it, but because the notion of it is inconsistent, or in other words, because it is repugnant that there should be a notion of it.”
—George Berkeley (1685–1753)