If anything qualifies us as heroic, it's that private perpetual struggle. (jillianlauren.com)
In policy - making there is no total and final victory, only perpetual struggle. (educationnext.org)
Malthus predicted that unchecked growth in human numbers would condemn our species to a «perpetual struggle for room and food» and an unbreakable cycle of squalor, famine and disease. (newscientist.com)