Tirukkural 896: Not Offending the Great

Though burnt by a fire (from a forest), one may perhaps live; (but) never will he live who has shown disrespect to the great (devotees).

Image of Satguru Sivaya Subramuniyaswami
When guests come, they must be given hospitality, at least a mat to sit on and a glass of water to drink. These are obligatory gifts. You must never leave your guest standing, and you must never leave your guest thirsty.
—Gurudeva