B.G 2.15

yaṁ hi na vyathayantyētē puruṣaṁ puruṣarṣabha। samaduḥkhasukhaṁ dhīraṁ sō'mr̥tatvāya kalpatē ॥ 2-15॥

O Chief of men, that brave person who is not tormented by these, and who reacts with equanimity to pain and pleasure, becomes fit for salvation.

Gīta Bhāshya 2.15

By bravery one can learn to react with equanimity.

ataḥ prayōjanamāha yaṁ hi iti॥ yam ētē mātrāsparśā na vyathayanti। puri śayamēva santam। śarīrasambandhābhāvē sarvēṣāmapi vyathābhāvāt puruṣam iti viśēṣaṇam। kathaṁ na vyathayanti? samaduḥkhasukhatvāt। tatkatham? dhairyēṇa ॥ 15 ॥

Its (overcoming self-attachment) practical use is stated by 'yam hi' verse. The person referred here is the one who does not get perturbed by the contact of sensations. Monk is the one who has the ability to sleep in the body with detachment. [Here 'Puri' means body.] Because of sentiment of association with body one who is perturbed all the time is specially called 'purusha'. How can one overcome this disturbance? Having equanimity towards pain and pleasure. How? By bravery.

Gīta Tātparya 2.15

One can defeat death only by becoming 'Purusha', i.e., understanding auspicious qualities of the Lord.

phalamāha। yaṁ hīti। na kēvalamavyathāmātrēṇāmr̥tatvaṁ kintu puruṣam।

The benefit is described in 'yam hi' verse. One cannot defeat death just by getting rid of misery. One can defeat it by becoming 'purusha'.

"puru brahma guṇādhikyāt tajjñānātpuruṣaḥ smr̥taḥ" iti pravr̥ttē।

"Brahman is called 'pura' because of increased auspicious qualities. One who has such knowledge of Brahman is called 'Purusha'".–thus states ancient text Pravrutti.

purusaraṇāt puruṣa ityarthaḥ ॥15 ॥

One who possesses the knowledge of auspicious qualities is the meaning of 'Purusha'.