In life we are accustomed to thinking either of the material or of the spiritual energy. Now, how can we transfer our thoughts from the material energy to the spiritual energy? There are so many literatures which fill our thoughts with the material energy-newspapers, magazines, novels, etc. Our thinking, which is now absorbed in these literatures, must be transferred to the Vedic literatures. The great sages, therefore, have written so many Vedic literatures, such as the Purāṇas. The Purāṇas are not imaginative; they are historical records. In the Caitanya-caritāmṛta (CC Madhya 20.122) there is the following verse:
- māyā-mugdha jīvera nāhi svataḥ kṛṣṇa-jñāna
- jīvere kṛpāya kailā kṛṣṇa veda-purāṇa
The forgetful living entities or conditioned souls have forgotten their relationship with the Supreme Lord, and they are engrossed in thinking of material activities. Just to transfer their thinking power to the spiritual sky, Kṛṣṇa-dvaipāyana Vyāsa has given a great number of Vedic literatures. First he divided the Vedas into four, then he explained them in the Purāṇas, and for less capable people he wrote the Mahābhārata. In the Mahābhārata there is given the Bhagavad-gītā. Then all Vedic literature is summarized in the Vedānta-sūtra, and for future guidance he gave a natural commentation on the Vedānta-sūtra, called Śrīmad-Bhāgavatam. We must always engage our minds in reading these Vedic literatures. Just as materialists engage their minds in reading newspapers, magazines and so many materialistic literatures, we must transfer our reading to these literatures which are given to us by Vyāsadeva; in that way it will be possible for us to remember the Supreme Lord at the time of death. That is the only way suggested by the Lord, and He guarantees the result: "There is no doubt."