Verse 15

पुष्पाक्रान्तौ करस्पन्दयत्नः पुत्रोपयुज्यते ।तदप्युपकरोत्यस्मिन्न संकल्पपरिक्षये

In plain words

In crushing a flower, O son, the effort of moving the hand is called for; but in this utter wasting away of saṃkalpa, not even that is of any use.