The Buddha said "There is no higher happiness than peace." We can glimpse this happiness when the obstructions of mind are progressively uprooted by accessing what are traditionally identified as the four stages of enlightenment.
Habitual thoughts of "who I am!," "what I want!," and "what I believe!," often bring difficulty. Insight into impermanence overcomes these tenacious tendencies of thinking, revealing the subtle happiness of wisdom.