Srimad Bhagavatam Canto 07, Chapter 04, Text 37

SB 7.4.37

nyasta-kridanako balo
 jadavat tan-manastaya
 na veda jagad idrsam
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
From the very beginning of his childhood, Prahlada Maharaja was uninterested in childish playthings. Indeed, he gave them up altogether and remained silent and dull, being fully absorbed in Krsna consciousness. Since his mind was always affected by Krsna consciousness, he could not understand how the world goes on being fully absorbed in the activities of sense gratification.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
Prahlada Maharaja is the vivid example of a great person fully absorbed in Krsna consciousness. In Caitanya-caritamrta (Madhya 8.274) it is said:
sthavara-jangama dekhe, na dekhe tara murti
 sarvatra haya nija ista-deva-sphurti
A fully Krsna conscious person, although situated in this material world, does not see anything but Krsna, anywhere and everywhere. This is the sign of a maha-bhagavata. The maha-bhagavata sees Krsna everywhere because of his attitude of pure love for Krsna. As confirmed in the Brahma-samhita (5.38):
 santah sadaiva hrdayesu vilokayanti
yam syamasundaram acintya-guna-svarupam
 govindam adi-purusam tam aham bhajami
“I worship the primeval Lord, Govinda, who is always seen by the devotee whose eyes are anointed with the pulp of love. He is seen in His eternal form of Syamasundara, situated within the heart of the devotee.” An exalted devotee, or mahatma, who is rarely to be seen, remains fully conscious of Krsna and constantly sees the Lord within the core of his heart. It is sometimes said that when one is influenced by evil stars like Saturn, Rahu or Ketu, he cannot make advancement in any prospective activity. In just the opposite way, Prahlada Maharaja was influenced by Krsna, the supreme planet, and thus he could not think of the material world and live without Krsna consciousness. That is the sign of a maha-bhagavata. Even if one is an enemy of Krsna, a maha-bhagavata sees him to be also engaged in Krsna’s service. Another crude example is that everything appears yellow to the jaundiced eye. Similarly, to a maha-bhagavata, everyone but himself appears to be engaged in Krsna’s service.
Prahlada Maharaja is the approved maha-bhagavata, the supreme devotee. In the previous verse it was stated that he had natural attachment (naisargiki ratih). The symptoms of such natural attachment for Krsna are described in this verse. Although Prahlada Maharaja was only a boy, he had no interest in playing. As stated in Srimad-Bhagavatam (11.2.42), viraktir anyatra ca: the symptom of perfect Krsna consciousness is that one loses interest in all material activities. For a small boy to give up playing is impossible, but Prahlada Maharaja, being situated in first-class devotional service, was always absorbed in a trance of Krsna consciousness. Just as a materialistic person is always absorbed in thoughts of material gain, a maha-bhagavata like Prahlada Maharaja is always absorbed in thoughts of Krsna.
Srimad Bhagavatam Canto 07, Chapter 04, Text 36
Srimad Bhagavatam Canto 07, Chapter 04, Text 38