B.G 2.15
यं हि न व्यथयन्त्येते पुरुषं पुरुषर्षभ। समदुःखसुखं धीरं सोऽमृतत्वाय कल्पते ॥ २-१५॥
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 Tātparya 2.15
One can defeat death only by becoming 'Purusha', i.e., understanding auspicious qualities of the Lord.
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'.
"Brahman is called 'pura' because of increased auspicious qualities. One who has such knowledge of Brahman is called 'Purusha'".–thus states ancient text Pravrutti.
One who possesses the knowledge of auspicious qualities is the meaning of 'Purusha'.