Srimad-Bhagavatam: Canto 4 - Chapter 1 - Verse 50
हरिर्देहभृतामात्मा स्वयं प्रकृतिरीश्वर: ।तत्पादमूलं शरणं यत: क्षेमो नृणामिह ॥ ५० ॥
harir deha-bhṛtām ātmāsvayaṁ prakṛtir īśvaraḥtat-pāda-mūlaṁ śaraṇaṁyataḥ kṣemo nṛṇām iha
Śrī Hari, the Supreme Personality of Godhead, is the Supersoul and guide of all living entities who have accepted material bodies within this world. He is the supreme controller of all material activities in material nature. He is also our best friend, and everyone should take shelter at His lotus feet. In doing so, one’s life will be auspicious.
In Bhagavad-gītā (18.61) it is said, īśvaraḥ sarva-bhūtānāṁ hṛd-deśe ’rjuna tiṣṭhati: “The Supreme Lord is situated in everyone’s heart, O Arjuna.” The living entity is within the body, and the Supersoul, the Supreme Personality of Godhead, is also there. He is called antaryāmī and caitya-guru. As Lord Kṛṣṇa states in Bhagavad-gītā (15.15), He is controlling everything: “I am seated in everyone’s heart, and from Me come remembrance, knowledge and forgetfulness.” Everything is being directed by the Supersoul within the body; therefore the better part of valor is to take His direction and be happy. To take His directions, one needs to be a devotee, and this is also confirmed in Bhagavad-gītā (10.10): “To those who are constantly devoted and worship Me with love, I give the understanding by which they can come to Me.” Although the Supersoul is in everyone’s heart (īśvaraḥ sarva-bhūtānāṁ hṛd-deśe ’rjuna tiṣṭhati), He talks only to the pure devotees who constantly engage in His service. In Caitanya-bhāgavata (Antya 3.45) it is said: “One who has fixed his mind on the lotus feet of Kṛṣṇa is to be understood as having the best education and as having studied all the Vedas.” There are also other appropriate quotes in Caitanya-bhāgavata: “The perfect result of an education is the fixing of one’s mind on the lotus feet of Kṛṣṇa.” (Ādi 13.178) “Conquering the world by means of material education is not desirable. If one engages himself in devotional service, his education is perfected.” (Ādi 13.173) “The purpose of education is to understand Kṛṣṇa and His devotional service. If one does not do so, then education is false.” (Ādi 12.49) “Being cultured, educated, very active and religious means developing natural love for Kṛṣṇa.” (Antya 3.44) Everyone has dormant love for Kṛṣṇa, and by culture and education that has to be awakened. That is the purpose of this Kṛṣṇa consciousness movement. Once Lord Caitanya asked Śrī Rāmānanda Rāya what the best part of education was, and Rāmānanda Rāya replied that the best part of education is advancement in Kṛṣṇa consciousness.