To become a pure devotee of Lord Kṛṣṇa, two things are very much essential, namely having a chance of being born in the family of a devotee and having the blessings of a bona fide spiritual master. So Parīkṣit Mahārāja had both blessings.
He, from the very childhood, from the womb of his mother, he was Kṛṣṇa conscious. And he had the opportunity of taking birth in a family where every member was Kṛṣṇa conscious, especially his grandfather Arjuna. So that chance was there. From the very beginning of his life, he was given the chance of worshiping Kṛṣṇa Deity. Not only that. He was king. Śucīnāṁ śrīmatāṁ gehe yoga-bhraṣṭo 'bhijāyate (BG 6.41). Yoga-bhraṣṭa means one who falls down from the path of spiritual advancement. For them, the facility is that they are given another chance to take birth in the human society. Not only in human society... Śucīnāṁ śrīmatāṁ gehe, in very rich family and very pure family. Śucīnām means pure, brāhmaṇa. So in India still, if one is born in a very nice, rich and pure family, he is considered to be very pious in his past life. That's a fact. Janmaiśvarya-śruta-śrī (SB 1.8.26). These four things, janma, high grade birth; aiśvarya, riches. Janmaiśvarya... śruta, education; and śrī, means beauty.
These four things are obtained by pious activities in one's past life. So Parīkṣit Mahārāja had all these assets. That means in his previous life he was also a great devotee. So now, in this life, he's bereft of everything. After executing spiritual life so strenuously, life after life, in this life we see that he's bereft of his kingdom, he's going to die within seven days, and he had to leave his beautiful wife, children, home, kingdom, his animals. Everything we keep, there is affection. It is not that animals are meant for killing. They are also treated like children. (aside:) Don't move your leg like that. So anything you associate, you get affection. That's a fact. Therefore here it is stated, rājye cāvikale nityaṁ virūḍhāṁ mamatāṁ jahau. And his kingdom was very safe kingdom. It was not that there was disturbance in his kingdom. Somebody has attacked, so he was bereft... No. Cāvikale, without any disturbance.