Bhagavad Gita 3.34इन्द्रियस्येन्द्रियस्यार्थे रागद्वेषौ व्यवस्थितौ।तयोर्न वशमागच्छेत्तौ ह्यस्य परिपन्थिनौ ॥

Each sense has got attraction for a pleasant object and aversion for a disagreeable object. If one can control these two currents, viz., attachment and aversion, he will not come under the sway of these two currents. Here lies the scope for personal exertion or Purushartha. Nature which contains the sum total of ones Samskaras or the latent selfproductive impressions of the past actions of merit and demerit draws a man to its course through the two currents, attachment and aversion. If one can control these two currents, if he can rise above the sway of love and hate through discrimination and Vichara or right enquiry, he can conquer Nature and attain immortality and eternal bliss. He willl no longer be subject to his own nature now. One should always exert to free himself from attachment and aversion to the objects of the senses.