"There's not a single witch or wizard who went bad who wasn't in Slytherin."

Slytherin produces more than its share of Dark wizards, but also turns out leaders who are proud, ambitious and cunning. Merlin is one particularly famous Slytherin.

Or perhaps in Slytherin
You’ll make your real friends,
Those cunning folk use any means
To achieve their ends

https://www.youtube.com/watch?v=t2RZMaFMfFc&list=LLw90wBp3qw_U4wykiwpWBtw&index=2&t=0s 💚