"the velocity of light is a constant"
"maintained a constant temperature" "principles of unvarying validity"
"a man constant in adherence to his ideals" "a constant lover" "constant as the northern star"
"the ceaseless thunder of surf" "in constant pain" "night and day we live with the incessant noise of the city" "the never-ending search for happiness" "the perpetual struggle to maintain standards in a democracy" "man's unceasing warfare with drought and isolation" "unremitting demands of hunger"
