यदुपादेयबुद्ध्या च तद्दुःखाय सुखाय ते ।भावाभावेन नादेयमकर्तृ सुखदुःखयोः
In plain words
Whatever, through the notion 'this is to be grasped', is grasped — that becomes, for you, a cause of sorrow or of joy. But what is not to be grasped, whether present or absent, is no agent of joy and sorrow at all.