The theory of chance can best be explained in the Vedic literature by the words ajnata-sukrti, which refer to pious activities performed without the actor's knowledge
SB Canto 4
The different varieties of life and of material existence do not come about by chance and necessity; they are different arrangements made by the Supreme Lord in terms of the pious and impious activities of the living entities. By performing pious activities one can take birth in a good family in a good nation, one can get a beautiful body or can become very well educated or very rich. We see, therefore, that in different places and in different planets there are different standards of life, bodily features and educational statuses, all awarded by the Supreme Personality of Godhead according to pious or impious activities. Varieties of life, therefore, develop not by chance but by prearrangement. There is a plan, which is already outlined in the Vedic knowledge. One has to take advantage of this knowledge and mold his life in such a way that at the end, especially in the human form of life, he may go back home, back to Godhead, by practicing Kṛṣṇa consciousness.
The theory of chance can best be explained in the Vedic literature by the words ajñāta-sukṛti, which refer to pious activities performed without the actor's knowledge. But these are also planned. For example, Kṛṣṇa comes like an ordinary human being, He comes as a devotee like Lord Caitanya, or He sends His representative, the spiritual master, or pure devotee. This is also the planned activity of the Supreme Personality of Godhead. They come to canvass and educate, and thus a person in the illusory energy of the Supreme Lord gets a chance to mix with them, talk with them and take lessons from them, and somehow or other if a conditioned soul surrenders to such personalities and by intimate association with them chances to become Kṛṣṇa conscious, he is saved from the material conditions of life. Kṛṣṇa therefore instructs:
- sarva-dharmān parityajya
- mām ekaṁ śaraṇaṁ vraja
- ahaṁ tvāṁ sarva-pāpebhyo
- mokṣayiṣyāmi mā śucaḥ
"Abandon all varieties of religion and just surrender unto Me. I shall deliver you from all sinful reaction. Do not fear." (BG 18.66) The word sarva-pāpebhyaḥ means "from all sinful activities." A person who surrenders unto Him by utilizing the chance to associate with the pure devotee, spiritual master or other authorized incarnations of Godhead, like Pṛthu Mahārāja, is saved by Kṛṣṇa. Then his life becomes successful.