Famous quotes containing the words world and/or challenge:
“A reasonable change of the world can not be instrumented by pure reason.”
—Friedrich Dürrenmatt (1921–1990)
“Men speak of natural rights, but I challenge any one to show where in nature any rights existed or were recognized until there was established for their declaration and protection a duly promulgated body of corresponding laws.”
—Calvin Coolidge (1872–1933)