Still, experts concede 21st century mine safety remains an elusive quest, tethered to discipline and vigilance.
According to Pearl, Chen spent months on his back, pretending to be near death, so that his guards would relax their vigilance.
People may not talk [about it], but there are some vigilance groups that work closely with the security forces.
vigilance is that “increased devotion” that Lincoln spoke of, to “resolve that these dead shall not have died in vain.”
Despite their vigilance they had seen nothing of armed men entering the town, they claimed.
Now, when we were in the upper room, their vigilance was still further increased.
A long stop at a café did not tire the vigilance of his escort.
Occasionally he relaxed his vigilance, when he swelled apace.
No flattery could lull his vigilance, no sophistry deceive his penetration.
But the vigilance of Henry was quickly aroused; the fugitives were pursued and captured.