Bhagavad Gita 3.33सदृशं चेष्टते स्वस्याः प्रकृतेर्ज्ञानवानपि।प्रकृतिं यान्ति भूतानि निग्रहः किं करिष्यति ॥

He who reads this verse will come to the conclusion that there is no scope for mans personal exertion. It is not so. Read the following verse. It clearly indicates that man can conquer Nature if he rises above the sway of RagaDvesha (love and hatred).The passionate and ignorant man only comes under the sway of his natural propensities, and his lower nature. He cannot have any restraint over the senses and the two currents of likes and dislikes. The seeker after Truth who is endowed with the four means, and who is constantly practising meditation can easily control Nature. (Cf.II.60V.14XVIII.59).