Lord Caitanya continued His teachings by pointing out that there are two kinds of living entities, the eternally liberated and the eternally conditioned. The eternally conditioned living entities can be divided into two types, the moving and the nonmoving. Those that remain in one place—trees, for example—are classified as sthāvara, or nonmoving entities, and those that move—such as birds and beasts—are called jaṅgama, or moving entities. The moving entities are further divided into three categories: those that fly in the sky, those that swim in the water, and those that walk on land. Out of the many millions and trillions of living entities on land, human beings are very few. Out of that small number of human beings, most are totally ignorant of the spiritual science, are unclean in their habits, and have no faith in the existence of the Supreme Personality of Godhead. In short, most human beings live like animals. Therefore these can be deducted from the number of human beings that constitute civilized human society.
We can hardly find any human beings who believe in the Vedic scriptures and the existence of God, or even in proper behavior. Those who do believe in these things, and in advancing in spiritual life, are known as Āryans. Out of those who believe in the scriptures and the advancement of human civilization, there are two classes—the righteous and the unrighteous. Those who are righteous generally execute fruitive activities to derive some good result for sense gratification. Out of many such persons who engage in righteous activities for sense gratification, only a few come to know about the Absolute Truth. These are called jñānīs, empiric philosophers in search of the Absolute Truth.