At the present moment the best sacrifice is recommended in the Śrīmad-Bhāgavatam—the sacrifice of chanting the holy name of Lord. Yajñaiḥ saṅkīrtana-prāyair yajanti hi su-medhasaḥ (SB 11.5.32).
So now you come here and sit down here for sometimes and chant the holy name of the Lord. That is also sacrifice. That is also sacrifice. This is recommended for this age especially. Because we cannot make any other sacrifice, so in this age . . . this age is called Kali. Kali means the age of quarrel. On minor things we are prepared to fight with one another. That is the system of this age. And if you open the newspaper in the morning, you will find so many news of fighting. So this is called the age of fighting and corruption.
So in this age, they . . . formerly, as the sages and great kings they were performing yajñas, Rājasūya yajña, aśvamedha-yajña and so many big, big yajñas, and they required large fund of money, so that is not possible in this age. Lord Caitanya therefore recommended . . . not only Lord Caitanya out of His own will He has recommended; it is prescribed in śāstra, and it is said, kṛte yad dhyāyato viṣṇum (SB 12.3.52).
Kṛte means in the Satya-yuga or what is generally known as Golden Age. So in the Satya-yuga people used to realize self or used to elevate themselves to highest perfection of life by meditation. Meditation.