Kṛṣṇa also said that if you want to enter this group, yānti deva-vratā devān, you can do so. Deva-vratā means if you want to enter into the . . . because there are roughly three divisions: deva-tiryaṅ-narādiṣu (SB 1.2.34). Deva. There, this whole universe is divided into three groups—there may be subgroups, but three groups. One group is called the demigods, deva. And deva-tiryaṅ. Tiryaṅ means lower than animals—birds, bees, trees, aquatics, like that, tiryaṅ. And nira, narā, narādiṣu: human. As we are above these lower animals—aquatics, birds, bees, trees, plants, insects, cats, dogs, so many—so, as we are above them, similarly, we are narā, human being, similarly, there is another group: they are called demigods. The demigods' group, just like the predominating deity in the moon planet, the sun planet, Venus and others, so many innumerable planets, Brahmā-loka, Satya-loka, Jana-loka, Mahar-loka—these are information we get from Vedic literature. But Kṛṣṇa says that you can go, you can enter in any one of these groups, as you like. As you like.
So this is the opportunity. This human form of life, it is just like via media. By evolution we have come to this human form of life from lower animals, beginning from aquatics. Jalajā nava-lakṣāṇi sthāvarā lakṣa-viṁśati (Padma Purāṇa). It is a long list. There are 900,000 forms of aquatics. If you go deep into the water, and if you have means to examine how many fishes and aquatic animals are there, you can count. But in the Vedic literature it is already counted, and the exact fixed number is given—there are 900,000 forms of aquatics. Jalajā nava-lakṣāṇi, sthāvarā lakṣa-viṁśati. Similarly, there are 2,000,000s forms of the trees and plants, like that. Sthāvarā lakṣa-viṁśati, kṛmayo rudra-saṅkhyakāḥ: and then insect life, there are 1,100,000 forms.