Sahasreṣu, many times thousands, many times. That means out of millions and trillions of persons. Many times thousands means... One hundred thousand makes one lakh. One hundred times lakhs makes one crore. Similarly, one hundred thousands of crores, billions and trillions, unlimited. First of all, manuṣya. Manuṣya means man. So, to get this human form of life, one has to wait for many, many millions of years, according to evolutionary process. Aśītiṁ caturaś caiva lakṣāṁs tāñ jīva-jātiṣu. In the Padma Purāṇa the evolution theory is described. That is taken away by Darwin, and in a perverted way he has described Darwin's theory of evolution; but that is not very scientific, although it is going on as scientific. But evolution theory is fact. Not that all of a sudden you get this body of human being, no. Tathā dehāntara-prāptiḥ (BG 2.13), "After death there is another body, dehāntara." Just like in this life also, we get dehāntara, another body. From baby's body to child's body, child's body to boy's body, boy's body to youth's body, from youth's body to old man's body; then, after old man's body, why not another body? But the rascals, they do not believe transmigration of the soul. It is very quite reasonable. After changing so many bodies, I have come to this old body. So what after this old body? There must be some body; it is quite reasonable. But these rascals have no brain to understand that there is life after death. Big, big professors in European countries, they do not believe transmigration of the soul.
So manuṣyāṇām, out of the, there are many kinds of men also. Just like kirāta-hūṇāndhra-pulinda-pulkaśā ābhīra-śumbhā yavanāḥ khasādayaḥ (SB 2.4.18). The Africans, the Mongolians, the Huns... There are so many. We know so many types of human beings. Out of that, a few who are known as Aryans, they are the best type of human being. And out of the Aryans, those who are followers of the Vedic principles, they are the best. But those who are following the Vedic principles, they say that "We are Vedic, or followers of the varṇāśrama-dharma"—in common sense they call "Hindu"—but actually, they say so, they do not follow the principles. They do not follow them. They act against the Vedic principles. Therefore it is said that even though one gets this human form of life after many, many millions of years, the living soul, still, there are so many divisions in the human form of life; therefore it is said, manuṣyāṇāṁ sahasreṣu: (BG 7.3) "Out of many millions of human beings," kaścid yatati siddhaye. Siddhaye. Siddhaye means to get the spiritual power, or spiritual rejuvenation. That is called siddhi.