Now the original person is Kṛṣṇa. Now, to maintain this creation, He expands Himself into three: hari, viriñci, hara. Hari means Viṣṇu, viriñci means Brahmā and hara means Lord Śiva. Hari-viriñci-hareti saṁjñāḥ. But, just like the Māyāvādī philosopher said that, "Then, if Kṛṣṇa has become Hari, Viriñci and Hara, three, so I can worship anyone." No. That is hinted here: śreyāṁsi tatra khalu sattva-tanor nṛṇāṁ syuḥ.
But if you want your ultimate goal, then you take shelter of Viṣṇu—sattva-tanoḥ—not Śiva, not Brahmā. Here, clearly says. If you want. Because your conditioned life is due to your disobedience to the Supreme Personality of Godhead. So unless you surrender unto Him, you again become obedient, there is no question of your goodness or your good or fortune. That is not possible. That is explained here.
Śreyāṁsi, if you want . . . Śreyāṁsi means if you want really ultimate benefit of your life, then sattva-tanoḥ. Sattva-tanoḥ means Viṣṇu. You have to take shelter of the form of the Lord who is representing sattva-guṇa, goodness. Not the rajo-guṇa, not the tamo-guṇa. If you take to rajo-guṇa, tamo-guṇa, then tadā rajas-tamo-bhāvāḥ kāma-lobhādayaś ca ye (SB 1.2.19), then you will be influenced by two qualities, namely greediness and lust. That's all. You'll never come to your senses. You'll be carried away by these two modes of material nature.
Bhaktivinoda Ṭhākura therefore said, māyār bośe, jāccho bhese' khāccho hābuḍubu bhāi. "My dear brother, you are being carried away by the waves of this material nature, two modes of material nature, and you are being harassed. Sometimes you are drowned, sometimes you are up." So, jīv kṛṣṇa-dās, e biśvās, korle to' ār duḥkho nāi. If you simply believe that you are eternal servant of Kṛṣṇa, then there is no more carrying out, no more carried away by these two things, lusty . . . lust and greediness. Therefore it is advised here that tatra . . . śreyāṁsi tatra khalu sattva-tanor nṛṇāṁ syuḥ. Our ultimate benefit rests when you take shelter of the sattva-tanoḥ.
Purport?
Pradyumna: "Why Lord Śrī Kṛṣṇa with his plenary parts shall be rendered devotional service as it is explained above is confirmed by this statement. Lord Śrī Kṛṣṇa and all His plenary parts are viṣṇu-tattva, or the Lordship of Godhead. From Śrī Kṛṣṇa, the next manifestation is Baladeva. From Baladeva is Saṅkarṣaṇa; from Saṅkarṣaṇa is Nārāyaṇa; again from Nārāyaṇa there is the second Saṅkarṣaṇa; and from this Saṅkarṣaṇa the Viṣṇu puruṣa-avatāras."