Like a Crystal

Mind, like a crystal, is colored by its surroundings. You are bound to reflect the qualities and shortcomings of the good or bad friends whose company you keep. If you associate with the malevolent, the selfish, the rancorous, the intolerant, and the arrogant, their faults will affect you. You would do better to keep your distance.

by Dilgo Khyentse Rinpoche