Walter Raleigh Quote
Flatterers are the worst kind of traitors, for they will strengthen thy imperfections, encourage thee in all evils, correct thee in nothing, but so shadow and paint thy follies and vices as thou shalt never, by their will, discover good from evil, or vice from virtue.
Remains of Sir Walter Raleigh; viz. Maxims of State. Advice to his Son, etc (ed. 1681)