अश्रद्दधानाः पुरुषा धर्मस्यास्य परंतप ।अप्राप्य मां निवर्तन्ते मृत्युसंसारवर्त्मनि ॥
aśraddadhānāḥ puruṣā dharmasyāsya paraṃtapaaprāpya māṃ nivartante mṛtyusaṃsāravartmani
(But faith is necessary). The souls that fail to get faith in the higher truth and law, O Parantapa, not attaining to Me, must return into the path of ordinary mortal living (subject to death and error and evil).
Gītā 9·3…it (the soul that fails to get faith) cannot grow into the Godhead which it denies. For this is a truth which has to be lived,—and lived in the soul’s growing light, not argued out in the mind’s darkness. One has to grow into it, one has to become it,—that is the only way to verify it.