Avoid him who talks sweetly before you but tries to ruin you behind your back, for he is like a pitcher of poison with milk on top.
One seldom recognizes the devil when he is putting his hand on your shoulder.
The person that's always talkin', you don't have to worry about that person. The person that while you're in his face, he's just lookin' at you with a smile on his face, that's the guy you worry about.
A friend you have to buy won't be worth what you pay for him.
A flatterer is a friend who is your inferior, or pretends to be so.
In four ways ... should one who flatters be understood as a foe in the guise of a friend: He approves of his friend's evil deeds, he disapproves his friend's good deeds, he praises him in his presence, he speaks ill of him in his absence.
He's the kind of guy who will stab you in the back right to your face.
If wealth come, beware of him, the smooth, false friend! There is treachery in his proffered hand; his tongue is eloquent to tempt; lust of many harms is lurking in his eye; he hath a hollow heart; use him cautiously.
He who speaks ill of an absent friend, or fails to take his part if attacked by another, that man is a scoundrel.
... he knew that the cruelest of blows too often came with a smile.
Comrades, this man has a nice smile, but he's got iron teeth.
The one thing worse than an enemy is a friend turned false.
[Thomas Henry] Huxley is a very genial, comfortable being-yet with none of the noisy and windy geniality of some folks here, whom you find with their backs turned when you are responding to the remarks that they have made you.
