Tirukkural 800: Investigation in Forming Friendships

Continue to enjoy the friendship of the pure; (but) renounce even with a gift, the friendship of those who do not agree (with the world).

Image of Satguru Sivaya Subramuniyaswami
A clean personal environment, wearing clean clothes, bathing often, keeping the room spotless where you meditate, breathing clean air, letting fresh air pass through your house, is all very important in the fulfillment of purity.
—Gurudeva