Bhagavad Gita Chapter 6, Verse 25

शनैः शनैरुपरमेद्बुद्ध्या धृतिगृहीतया | आत्मसंस्थं मनः कृत्वा न किञ्चिदपि चिन्तयेत् ||

śanaiḥ śanair uparamed buddhyā dhṛti-gṛhītayā ātma-saṁsthaṁ manaḥ kṛtvā na kiñcid api cintayet

Gradually, step by step, one should attain tranquility with the help of a resolute intellect; having fixed the mind in the Self, one should not think of anything else.

Krishna provides practical guidance for achieving tranquility. 'Śanaiḥ śanair uparamet'—gradually (śanaiḥ), step by step (śanaiḥ), one should attain tranquility (uparamet). This means: don't expect instant results—progress happens gradually, step by step. Be patient. 'Buddhyā dhṛti-gṛhītayā'—with the help of (buddhyā) a resolute (dhṛti) intellect (gṛhītayā). This means: use your intellect firmly, with determination, with resolve—not passively, but actively. 'Ātma-saṁsthaṁ manaḥ kṛtvā'—having fixed (kṛtvā) the mind (manaḥ) in the Self (ātma-saṁstham). This means: establish your mind in your true nature—not scattered, not wandering, but fixed in the Self. 'Na kiñcid api cintayet'—should not think (cintayet) of anything (kiñcit) else (api). This means: once your mind is fixed in the Self, don't think of other things—no distractions, no wandering thoughts, just the Self. This is the method: gradually, with resolute intellect, fix mind in Self, think of nothing else.