bandhur ātmātmanas tasya
anātmanas tu śatrutve
bandhuḥ — friend; ātmā — the mind; ātmanaḥ — of the living entity; tasya — of him; yena — by whom; ātmā — the mind; eva — certainly; ātmanā — by the living entity; jitaḥ — conquered; anātmanaḥ — of one who has failed to control the mind; tu — but; śatrutve — because of enmity; varteta — remains; ātmā eva — the very mind; śatru-vat — as an enemy.
For him who has conquered the mind, the mind is the best of friends; but for one who has failed to do so, his mind will remain the greatest enemy.
. . .
बन्धुरात्मात्मनस्तस्य येनात्मैवात्मना जित: ।
अनात्मनस्तु शत्रुत्वे वर्तेतात्मैव शत्रुवत् ॥ ६ ॥