Unable to be alone in your house, you are always inviting guests. Your living room is so crowded with them that there is no more ventilation, and the air is saturated with psychic toxins. Just like your blood, your psyche needs good circulation in order to eliminate toxins. You clog up and pollute it by accumulating dubious guests and useless distractions, so that thought forms can no longer circulate freely. Furthermore, negative thought forms such as fear, anxiety, despair, envy, and anger are actually growing in your house, becoming quite large. Why are these things growing like this? Because of the kind of guests you welcome. For example, when you indulge in unwholesome television, pessimistic literature, and violent movies, you are watering and nourishing the negative seeds in yourself.
— Thich Nhat Hanh, Thich Nhat Hanh by Jean-Pierre Cartier, Rachel Cartier