A devotee is always in Kṛṣṇa consciousness. So there is no question of chance. He does not give any chance to think otherwise. Therefore he is guaranteed. But for others there are some chances like that, that in particular moment if he dies, if he leaves this body, then he can enter into the spiritual kingdom.
- agnir jyotir ahaḥ śuklaḥ
- ṣaṇ-māsā uttarāyaṇam
- tatra prayātā gacchanti
- brahma brahma-vido janāḥ
You know that the sun's movement are different, six months on the northern side and six months on the southern side. The sun is also moving according to Vedic calculation, and in Śrīmad-Bhāgavatam we get information that the sun is in the center of the universe. And it is also moving. As all other planets are moving, the sun is also moving. And the movement, I have seen, it is calculated that it is sixteen thousand miles per second. The sun's movement is like that. So, if we believe... And we can see the sun's movement, northern side and southern side. So when a person dies during this movement of the sun on the northern side, then he can attain liberation. That is stated in Bhagavad-gītā; in other Vedic scriptures also.
- dhūmo rātris tathā kṛṣṇaḥ
- ṣaṇ-māsā dakṣiṇāyanam
- tatra cāndramasaṁ jyotir
- yogī prāpya nivartate
And if somebody dies at night, and in cloud, and it is the season during the six months when the sun is on the southern side, then the yogi, a person who dies in that particular time, he comes back again in this material world.
- śukla-kṛṣṇe gatī hy ete
- jagataḥ śāśvate mate
- ekayā yāty anāvṛttim
- anyayāvartate punaḥ
In this way, either this side or that side, that is accidental. That nobody can say, "When I'm going to die." It is simply accidental. If somebody dies accidentally during this period as stated, so somebody can attain liberation and somebody may not attain. And that is doubtful.