“There is no fire like lust, no crime like hatred, no sorrow like the aggregates of clinging, and no happiness higher than inner peace.”
Canonical Pali Original: Natthi rāgasamo aggi, natthi dosasamo kali; Natthi khandhasamā dukkhā, natthi santiparaṃ sukhaṃ.
— Gautam Buddha
The Awakened One, Founder of Dhamma
Pali Canon: Dhammapada 15.202 asserting that Santi (peace of mind) is the highest form of happiness.