तत्क्षेत्रं यच्च यादृक्च यद्विकारि यतश्च यत् |\nस च यो यत्प्रभावश्च तत्समासेन मे शृणु ||१३-४||
tatkṣetraṃ yacca yādṛkca yadvikāri yataśca yat .\nsa ca yo yatprabhāvaśca tatsamāsena me śṛṇu ||13-4||
Listen and I will explain to you what that field is and what its nature is.  I will also explain how change takes place within it, from what it was created, who the knower of the field of activities is, and what his powers are.