" Now listen, Arjuna: there are also three kinds of happiness. By sustained effort, one comes to the end of sorrow. 37 That which seems like poison at first, but tastes like nectar in the end – this is the joy of sattva, born of a mind at peace with itself. 38 Pleasure from the senses seems like nectar at first, but it is bitter as poison in the end. This is the kind of happiness that comes to the rajasic. 39 Those who are tamasic draw their pleasures from sleep, indolence, and intoxication. Both in the beginning and in the end, this happiness is a delusion. "

― Krishna-Dwaipayana Vyasa , The Bhagavad Gita