Why there is creation? This creation is a chance given to the conditioned soul how to come to his senses, that living entity, that he is eternally servant of Kṛṣṇa, part and parcel. His only business is to satisfy Kṛṣṇa. So here is a chance. If we don't take this chance, then again the creation will be wound up, it will be destroyed. Again there will be creation, again another chance will be given. This is going on. Bhūtvā bhūtvā pralīyate (BG 8.19). In the Bhagavad-gītā it is said, bhūtvā bhūtvā pralīyate. It is manifested sometimes and maintained for some time and again destroyed.
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.