Śrīmad-Bhāgavatam · Text 11.23.48
Who is speaking and story frame
तं दुर्जयं शत्रुमसह्यवेग-
मरुन्तुदं तन्न विजित्य केचित् ।
कुर्वन्त्यसद्विग्रहमत्र मर्त्यै-
र्मित्राण्युदासीनरिपून् विमूढा: ॥ ४८ ॥
tam durjayaṁ śatrum asahya-vegam
arun-tudaṁ tan na vijitya kecit
kurvanty asad-vigraham atra martyair
mitrāṇy udāsīna-ripūn vimūḍhāḥ
Failing to conquer this irrepressible enemy, the mind, whose urges are intolerable and who torments the heart, many people are completely bewildered and create useless quarrel with others. Thus they conclude that other people are either their friends, their enemies or parties indifferent to them.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.