In the Satya-yuga the process of self-realization was meditation, and this process is taught by the white incarnation of God. This incarnation gave a benediction to the sage Kardama by which he could have an incarnation of the Personality of Godhead as his son. In the Satya-yuga, everyone meditated on Kṛṣṇa, and each and every living entity was in full knowledge. In this present age, Kali-yuga, people who are not in full knowledge are still attempting this meditative process which was recommended for a previous age. The process for self-realization recommended in the Tretā millennium was the performance of sacrifice, and this was taught by the red incarnation of God. In the Dvāpara millennium, Kṛṣṇa was personally present, and He was worshiped by everyone by the mantra:
- namas te vāsudevāya
- namaḥ saṅkarṣaṇāya
- pradyumnāyāniruddhāya
- tubhyaṁ bhagavate namaḥ
"Let me offer my obeisances unto the Supreme Personality of Godhead, Vāsudeva, Saṅkarṣaṇa, Pradyumna, and Aniruddha."