Marching thus at night, a battalion is doubly impressive. The silent monster is full of restrained power; resolute in its onward sweep, impervious to danger, it looks a menacing engine of destruction, steady to its goal, and certain of its mission. Patrick MacGill
Power always has to be kept in check; power exercised in secret, especially under the cloak of national security, is doubly dangerous. William Proxmire
The theoretically unrestricted right to develop power, to wage war against other states, is antisocial and is doubly dangerous, because the state as a mass entity represents a low moral and intellectual level. Christian Lous Lange
With the connivance and assistance of his wife he disguised himself, covered those keen eyes with tinted glasses, masked the face with a moustache and a pair of bushy whiskers, sunk that clear voice into an insinuating whisper, and doubly secure on account of the girl's short sight, he appears as Mr. Hosmer Angel, and keeps off other lovers by making love himself.
