Thirst can never be satiated. Contentment is the greatest happiness. Hence, wise men regard contentment as the most valuable wealth.
अन्तो नास्ति पिपासायास्तुष्टिस्तु परमं सुखम्। तस्मात् संतोषमेवेह धनं पश्यन्ति पण्डिताः॥