He sounds exactly like Moody," said Harry quietly, tucking the letter away again inside his robes. "'Constant vigilance!' You'd think I walk around with my eyes shut, banging off the walls.
J. K. RowlingCourse Dumbledore trusts you,โ growled Moody. โHeโs a trusting man, isnโt he? Believes in second chances. But me โ I say there are spots that donโt come off, Snape. Spots that never come off, dโyou know what I mean?
J. K. Rowling