Swami Swarupananda, Srimad Bhagavad Gita (1909)
[4]That firm man whom these afflict not, O chief among men, balanced in pleasure and pain, wise, is fit for immortality.
BG 2.15
यं हि न व्यथयन्त्येते पुरुषं पुरुषर्षभ। समदुःखसुखं धीरं सोऽमृतत्वाय कल्पते॥
yaṃ hi na vyathayantīte puruṣaṃ puruṣarṣabha / sama-duḥkha-sukhaṃ dhīraṃ so 'mṛtatvāya kalpate
"The person unmoved by pleasure and pain is fit for liberation — equanimity is not coldness but freedom."
4 translations · all pre-1928 or released to public domain · sources
That firm man whom these afflict not, O chief among men, balanced in pleasure and pain, wise, is fit for immortality.
That man who is not troubled by these, O chief of men, who is the same in pleasure and pain and is undisturbed, is fitted for immortality.
He is not harmed who self-sufficing bears Heat, cold, pleasure, and pain — The brave, the wise — such is man worthy of eternal life.
That man whom these do not trouble, O chief of men, who is the same in pain and pleasure and is brave, is fit for immortality.