तस्मान्न दुःखिता युक्ता प्राकृते जागते क्रमे ।तथैव मुदिता युक्ता युक्तं कार्यानुवर्तनम्
In plain words
Therefore sorrowing does not befit the natural course of the world, and in just the same way rejoicing does not befit it; what befits it is following through on what is to be done.