Prabhupāda: So it is not a new thing most of the ācāryas they accepted. Just like in the beginning all the four ācāryas namely Rāmānujācārya, Madhvācārya, Nimbārka, Viṣṇu Svāmī, they accepted sannyāsa and in that line Caitanya Mahāprabhu He accepted sannyāsa. Then further down to my Guru Mahārāja he accepted sannyāsa, I have accepted sannyāsa, so pūrvatamair mahadbhiḥ (SB 11.23.57).
(I shall cross over the insurmountable ocean of nescience by being firmly fixed in the service of the lotus feet of Kṛṣṇa. This was approved by the previous ācāryas, who were fixed in firm devotion to the Lord, Paramātmā, the Supreme Personality of Godhead.)
As previous ācāryas accepted, so I am accepting also. Mahat eh?, parātma-niṣṭhām. Full faith for developing full faith in the Supreme Personality of Godhead . . . (indistinct) . . . go on.
Siddha-svarūpānanda: mahadbhiḥ–means great . . .
Prabhupāda: mahadbhiḥ, mahadbhiḥ means great ācāryas, previous guru's ācāryas, yes?
Siddha-svarūpānanda: ahaṁ–myself; tariṣyāmi–means, shall crossover.
Prabhupāda: That's all, this material existence is very difficult to crossover but by accepting this sannyāsa order, by preaching Kṛṣṇa consciousness I shall also crossover the ocean of nescience.