Sanskrit
श्रद्धावाँल्लभते ज्ञानं तत्परः संयतेन्द्रियः । ज्ञानं लब्ध्वा परां शान्तिमचिरेणाधिगच्छति ॥
śraddhāvāl labhate jñānaṃ tat-paraḥ saṃyatendriyaḥ jñānaṃ labdhvā parāṃ śāntim acireṇādhigacchati
Translation
The man who is full of faith obtaineth wisdom, and he also who hath mastery over his senses; and, having obtained wisdom, he goeth swiftly to the supreme Peace.
Annie Besant · The Bhagavad-Gita, translated by Annie Besant (4th ed., 1922) — Wikisource · Public Domain
Explanation
Two conditions are named for obtaining this wisdom: śraddhā, a committed and trusting orientation rather than passive belief, and mastery over the senses; together they deliver it quickly, and wisdom in turn delivers supreme peace without delay, acireṇa. The pairing is deliberate — faith alone can slide into credulity, and sense-control alone can slide into mere suppression, but the text insists it takes both together to actually open the door verse 34 described.