[Someone may say that aside from devotees, who always seek shelter at the Lord’s lotus feet, there are those who are not devotees but who have accepted different processes for attaining salvation. What happens to them? In answer to this question, Lord Brahmā and the other demigods said:] O lotus-eyed Lord, although nondevotees who accept severe austerities and penances to achieve the highest position may think themselves liberated, their intelligence is impure. They fall down from their position of imagined superiority because they have no regard for Your lotus feet.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
येऽन्येऽरविन्दाक्ष विमुक्तमानिन- स्त्वय्यस्तभावादविशुद्धबुद्धयः । आरुह्य कृच्छ्रेण परं पदं ततः पतन्त्यधोऽनादृतयुष्मदङ्घ्रयः
ye'nye'ravindākṣa vimuktamānina- stvayyastabhāvādaviśuddhabuddhayaḥ | āruhya kṛcchreṇa paraṃ padaṃ tataḥ patantyadho'nādṛtayuṣmadaṅghrayaḥ
SB 10.2.32