Tirukkural 610: Unsluggishness

The king who never gives way to idleness will obtain entire possession of (the whole earth) passed over by him who measured (the worlds) with His foot.

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.