BG 2.15
यं हि न व्यथयन्त्येते पुरुषं पुरुषर्षभ ।
समदुःखसुखं धीरं सोऽमृतत्वाय कल्पते ॥
समदुःखसुखं धीरं सोऽमृतत्वाय कल्पते ॥
yaṁ hi na vyathayanty ete puruṣaṁ puruṣarṣabha
sama-duḥkha-sukhaṁ dhīraṁ so ’mṛtatvāya kalpate
sama-duḥkha-sukhaṁ dhīraṁ so ’mṛtatvāya kalpate
Word-for-word meanings
puruṣa-ṛṣabha — O best of men; dhīram — for a wise; puruṣam — person; sama — who is equal; duḥkha — in pain; sukham — [and] in pleasure; yam — for whom; ete — these [sense contacts]; na — do not; vyathayanti — cause disturbance; saḥ — he; hi — indeed; kalpate — is eligible; amṛtatvāya — for immortality.
Translation
O best of men, the wise person who is not disturbed by these sense contacts, who is equally disposed in pleasure and pain, is certainly eligible for immortality.