यदा संहरते चायं कूर्मोऽङ्गानीव सर्वशः | इन्द्रियाणीन्द्रियार्थेभ्यस्तस्य प्रज्ञा प्रतिष्ठिता ||
Yada samharate chayam
When a person withdraws the senses from objects, like a tortoise withdraws its limbs, his wisdom becomes steady.
Modern Application: Self-control is power.
Deep Wisdom: Krishna uses a powerful analogy — control over senses leads to stability.