C.N. Douglas, comp. Forty Thousand Quotations: Prose and Poetical. 1917.
Vigilance
The master’s eye makes the horse fat.
From the Latin.
It is the enemy who keep the sentinel watchful.
Mme. Swetchine.
Vigilance is not only the price of liberty, but of success of any sort.
Beecher.
He is most free from danger, who, even when safe, is on his guard.
Syrus.
There is a significant Latin proverb, to wit, Who will guard the guards?
H. W. Shaw.
A prudent person, having to do with a designing one, will always distrust most when appearances are fairest.
Richardson.
Ben Jonson.