Bhagavad Gita · Chapter 18: Freedom through Renunciation

Bhagavad Gita 18.38

viṣayendriyasaṃyogādyattadagre'mṛtopamam | pariṇāme viṣamiva tatsukhaṃ rājasaṃ smṛtam ||

The happiness that comes from the contact of the senses with their objects, which is like nectar at first but like poison in the end, is held to be of passion.

Modern context

Rajasic happiness is the reverse: nectar at first, poison in the end. Overeating, overspending, the endless scroll, the quick thrill: they feel wonderful in the moment and leave a bitter aftertaste. This verse is a simple test anyone can use. Before reaching for a pleasure, ask: how will I feel about this in an hour, a day, a year?