Chapter 2 · verse 53 · gita.yoga.org

Bhagavad Gita 2.53

श्रुतिविप्रतिपन्ना ते यदा स्थास्यति निश्चला। समाधावचला बुद्धिस्तदा योगमवाप्स्यसि

When your intellect, which is perplexed by the Vedic texts you have read, stands immovable and steady in the Self, then you will attain Self-realization.