The bhāgavata-dharma and bhakti-yoga or yoga practice—everything synonymous. There is no difference. But this is the easiest process. Here you will find the students, although they are not exercising the bodily āsana, praṇāyāma, it is automatically being done, because the mind is the center of all activity. The mind is always engaged in Kṛṣṇa. That is bhāgavata-dharma.
So as we have explained several times in these classes, that this concentration is required. And that should be taught from the very beginning of life, kaumāra. Kaumāra means from five years to fifteen years. From sixteenth year, one becomes . . . one's youthfulness begins, say, up to forty years. Then middle age up to sixty years. Then after sixty years, one is old. This is the definition of different ages. So kaumāra ācaret prājñaḥ. If one is intelligent, if one is wise . . . prājña means wise. If he's a fool, rascal, it is not for them.
Caitanya-caritāmṛta therefore says, kṛṣṇa yei bhaje sei baḍa caturā. Caturā means very intelligent. Unless one is very intelligent, he cannot understand the philosophy of Kṛṣṇa consciousness. And if you try to find out intelligent class of men, naturally the number will be very small. If you want that in this street find out some boys who have passed their M.A. examination and Ph.D. examination, hardly you will find one or two. But if you try to find out the illiterate or without any education, you will find many. So we should not judge by the number; we should judge by the quality, what is the quality.