Also because,
युक्तः कर्मफलं त्यक्त्वा शान्तिमाप्नोति नैष्ठिकीम् ।
अयुक्तः कामकारेण फले सक्तो निबध्यते ॥ १२ ॥
yuktaḥ karmaphalaṃ tyaktvā śāntimāpnoti naiṣṭhikīm .
ayuktaḥ kāmakāreṇa phale sakto nibadhyate .. 12 ..
The steady-minded one, abandoning the fruit of action, attains the peace born of devotion. The unsteady one, attached to the fruit through the action of desire, is firmly bound.
Read the commentary
The steady-minded man who, resolved that “I do actions for the sake of the Lord, not for my benefit,” abandons the fruit of action attains the peace called moksha, as the result of devotion, through the following stages : first, purity of the mind; then, attainment of knowledge; then, renunciation of all actions; and lastly, devotion to knowledge. But he who is unsteady is led by desire and is attached to the fruit, thinking ‘I do this act for my benefit.’ He is firmly bound. Wherefore, be thou steady-minded.