Kṛṣṇa Erects the Dvārakā Fort
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Kālayavana saw Him, however, in His Viṣṇu form, with a well-built body, with four hands, and eyes like newly blooming lotus petals. Kṛṣṇa appeared blissful, with a handsome forehead and beautiful face, with smiling restless eyes and moving earrings. Before seeing Kṛṣṇa, Kālayavana had heard about Him from Nārada, and now the descriptions of Nārada were confirmed. He noticed Kṛṣṇa's specific marks and the jewels on His chest, His beautiful garland of lotus flowers, His lotus-like eyes and similarly beautiful bodily features. He concluded that this beautiful personality must be Vāsudeva, because every description of Nārada's which he had heard previously was substantiated by the presence of Kṛṣṇa. Kālayavana was very much astonished to see that He was passing through without any weapon in His hands and without any chariot. He was simply walking on foot. Kālayavana had come to fight with Kṛṣṇa, and yet he had sufficient principles not to take up any kind of weapon. He decided to fight with Him hand to hand. Thus he prepared to capture Kṛṣṇa and fight.
Kṛṣṇa, however, went ahead without looking at Kālayavana, and Kālayavana began to follow Him with a desire to capture Him. But in spite of all his swift running, he could not capture Kṛṣṇa. Kṛṣṇa cannot be captured even by the mental speed attained by great  yogī s. He can be captured only by devotional service, and Kālayavana was not practiced in devotional service. He wanted to capture Kṛṣṇa, and as he could not do so he was following him from behind.
Kālayavana began running very fast, and he was thinking, "Now I am nearer; I will capture Him," but he could not. Kṛṣṇa led him far away, and He entered the cave of a hill. Kālayavana thought that Kṛṣṇa was trying to avoid fighting with him and was therefore taking shelter of the cave. He began to chastise Him with the following words: "Oh You, Kṛṣṇa! I heard that You are a great hero born in the dynasty of Yadu, but I see that You are verily running away from fighting, like a coward. It is not worthy of Your good name and family tradition." Kālayavana was following, running very fast, but still he could not catch Kṛṣṇa because he was not freed from all contaminations of sinful life.
According to Vedic culture, anyone who does not live following the regulative principles of life observed by the higher castes like the  brāhmaṇas ,  kṣatriyas ,  vaiśyas  and even the laborer class is called  mleccha . The Vedic social situation is so planned that persons who are accepted as  śūdras  can gradually be elevated to the position of  brāhmaṇas  by the cultural advancement known as  saṁskāra , or the purificatory process. The version of the Vedic scriptures is that no one becomes a  brāhmaṇa  or a  mleccha  simply by birth; by birth everyone is accepted as  śūdra . One has