भव्योऽसि चेत्तदेतस्मात्सर्वमाप्नोषि निश्चयात् ।नो चेत्तद्वह्वपि प्रोक्तं त्वयि भस्मनि हूयते
In plain words
If you are fit for it, then from this, through firm certainty, you attain everything. But if you are not, then even much that is taught is an oblation poured into you as into ashes.