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
Faithfulness in marriage means fidelity and much more. It includes mental faithfulness, non-flirtatiousness and modesty toward the opposite sex. A married man, for instance, should not hire a secretary who is more magnetic or more beautiful than his wife.
—Gurudeva