विषयेन्द्रियसंयोगाद्यत्तदग्रेऽमृतोपमम् । परिणामे विषमिव तत्सुखं राजसं स्मृतम् ॥३८॥
viṣayendriya-saḿyogād yat tad agre 'mṛtopamam pariṇāme viṣam iva tat sukhaḿ rājasaḿ smṛtam
viṣaya — of the objects of the senses; indriya — and the senses; saṁyogāt — from the combination; yat — which; tat — that; agre — in the beginning; amṛta-upamam — just like nectar; pariṇāme — at the end; viṣam iva — like poison; tat — that; sukham — happiness; rājasam — in the mode of passion; smṛtam — is considered.
Happiness is said to be in the mode of passion when it is derived from the contact of the senses with their objects. Such happiness is like nectar at first but poison at the end.
A young man and a young woman meet, and the senses drive the young man to see her, to touch her and to have sexual intercourse. In the beginning this may be very pleasing to the senses, but at the end, or after some time, it becomes just like poison. They are separated or there is divorce, there is lamentation, there is sorrow, etc. Such happiness is always in the mode of passion. Happiness derived from a combination of the senses and the sense objects is always a cause of distress and should be avoided by all means.