Śrī Narottama dāsa Ṭhākura has sung that persons who do not take to the devotional service of the Lord but are attracted to the process of philosophical speculation and fruitive activities drink the poisonous results of such actions. Such persons eat all kinds of obnoxious things, such as meat, and take pleasure in alcohol and other intoxicants, and after death they are forced to take birth in lower species of life. Materialistic persons generally worship the transient material body and forget the welfare of the spirit soul within the body. Some take shelter of materialistic science to improve bodily comforts, and some take to the worship of demigods to be promoted to the heavenly planets. Their goal in life is to make the material body comfortable, but they forget the interest of the spirit soul. Such persons are described in the Vedic literature as suicidal, because attachment for the material body and its comforts forces the living entity to wander through the process of birth and death perpetually and suffer the material pangs as a matter of course. The human form of life is a chance for one to understand his position. Therefore the most intelligent person takes to devotional service just to engage his mind, senses and body in the service of the Lord without deviation.
The personified Vedas continued: "Dear Lord, there are many mystic yogīs who are very learned and deliberate in achieving the highest perfection of life. They engage themselves in the yogic process of controlling the life air within the body. Concentrating the mind upon the form of Viṣṇu and controlling the senses very rigidly, they practice the yoga system, but even after much laborious austerity, penance and regulation, they achieve the same destination as persons inimical toward You. In other words, both the yogīs and the great, wise philosophical speculators ultimately attain the impersonal Brahman effulgence, which is automatically attained by the demons who are regular enemies of the Lord. Demons like Kaṁsa, Śiśupāla and Dantavakra attain the Brahman effulgence because they constantly meditate upon the Supreme Personality of Godhead out of enmity. The real point is to concentrate the mind on the Supreme Personality of Godhead. Women such as the gopīs were attached to Kṛṣṇa, being captivated by His beauty, and their mental concentration on Kṛṣṇa was provoked by lust. They wanted to be embraced by the arms of Kṛṣṇa, which resemble the beautiful round shape of a snake. Similarly, we, the Vedic hymns, simply concentrate our minds on the lotus feet of Your Lordship. Women like the gopīs concentrate upon You under the dictation of lust, and we concentrate upon Your lotus feet to go back home, back to Godhead. Your enemies also concentrate upon You, thinking always of how to kill You, and yogīs undertake great penances and austerities just to attain Your impersonal effulgence. All these different persons, although concentrating their minds in different ways, achieve spiritual perfection according to their different perspectives because You, O Lord, are equal to all Your devotees."