श्लोक 6.6

बन्धुरात्मात्मनस्तस्य येनात्मैवात्मना जितः। अनात्मनस्तु शत्रुत्वे वर्तेतात्मैव शत्रुवत्॥

bandhur ātmātmanas tasya yenātmaivātmanā jitaḥ, anātmanas tu śatrutve vartetātmaiva śatru-vat.

Meaning

When you learn to control your thoughts, your mind helps you make good choices. An uncontrolled mind creates fear and confusion.