BG 18.59
यद्यहंकारमाश्रित्य न योत्स्य इति मन्यसे
मिथ्यैष व्यवसायस्ते प्रकृतिस्त्वां नियोक्ष्यति
yadyahaṃkāramāśritya na yotsya iti manyase
mithyaiṣa vyavasāyaste prakṛtistvāṃ niyokṣyati
TRANSLATION
If, in your self-conceit, you think, ‘I will not fight,’ your resolve is in vain. Nature will compel you.
PURPORT
If, in your ‘self-conceit,’ i.e., under a false sense of independence that you know what is good for you and what is not —if, not heeding My command, you think, .’I will not fight,’ then this resolve based on your sense of independence will be in vain. For Nature will compel you to go against your resolve—you who are ignorant and who adversely react to my sovereignty.
He elucidates the same: