You can imagine how intelligent at that time people were that Mahābhārata was . . . Mahābhārata is . . . even at the present moment they cannot understand rightly Mahābhārata. Say, for Bhagavad-gītā. Bhagavad-gītā is part of Mahābhārata. But the philosophy is not understood properly even by the greatest philosophers. They commit mistake.
So that means as the days are going, we are becoming less, less intelligent. Less, less intelligent. Therefore in this age of less-intelligence class of men, this, the yoga system as it is . . . not bluff yoga; real yoga. Yoga indriya saṁyama. Oh, that is not possible, real yoga system. Controlling the senses, sit in a solitary place, and alone, with celibate life, no sense enjoyment—there are so many rules and regulations. Not that . . . if I say that, "Whatever you like, you can do. You just meditate," what meditation you'll do? That is not possible in this age.
Next stage of elevation is sacrifice. These are statement of the Vedic literature. In the Vedic literature . . .
(break) . . . kṛte yad dhyāyato viṣṇum (SB 12.3.52). Meditation means meditating on Viṣṇu, on the Supreme Lord, this Viṣṇu form, as you have got in my front. Meditation. That is called yoga. By meditating on Viṣṇu, one realizes everything and gets some power, wonderful power. So Bhāgavata says that kṛte yad dhyāyato viṣṇum. The perfection of life (is) attained in the Satya-yuga, or golden age, by meditating on Viṣṇu. That is meditation.
Tretāyāṁ yajato makhaiḥ. The next stage, Tretā-yuga, by offering sacrifice. That is in the second age. And dvāpare paricaryāyām. In the next age, Dvāpara age, by temple worship, church worship. So Lord Caitanya says that kalau nāsty eva nāsty eva nāsty eva (CC Adi 17.21). Three times. Three times "no." That means meditation is not possible, sacrifice not possible, temple worship or church worship not possible. Then what is possible? Kalau tad dhari-kīrtanāt. In this age, simply by chanting the glories of the Lord, Hare Kṛṣṇa. These are prescribed.