yat tad agre ’mṛtopamam
pariṇāme viṣam iva
tat sukhaṁ rājasaṁ 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.
That happiness which is derived from contact of the senses with their objects and which appears like nectar at first but poison at the end is said to be of the nature of passion.
. . .
परिणामे विषमिव तत्सुखं राजसं स्मृतम् ॥ ३८ ॥