bandhuh-friend; atma-mind; atmanah-of the living entity; tasya-of him; yena-by whom; atma-mind; eva-certainly; atmana-by the living entity; jitah-conquered; anatmanah-of one who has failed to control the mind; tu-but; satrutve-because of enmity; varteta-remains; atma eva-the very mind; satruvat-as an enemy.