By the process of Hatha Yoga, the Yogi attains perfect physical body - Rupalavanya Bala Vajrasam-hanana Kaya Sampat. ???The perfection of the body consists in beauty, grace, strength and adamantine hardness.??? The power to bear extreme cold and heat (Titiksha), the power to live without water and food and other powers come under the category of Kaya Sampat (perfection of body).