The phrase "eternal vigilance" means that we must always be carefully watching and paying attention to prevent something bad from happening.
Sentences with «eternal vigilance»
They are weary of eternal vigilance and of the perennial danger of losing their children to war or terrorism. (firstthings.com)
Those who decry the novel for having failed to anticipate, say, the collapse of totalitarian Communism are missing the point - for it prescribes the need for eternal vigilance against these tendencies, in ourselves as much as in others. (totalpolitics.com)
It is realistic wisdom and eternal vigilance, not utopian dreams, that may guide us through these rapids. (religion-online.org)