Question: What is your definition of pure happiness?
Answer: The original question was “What is true happiness”. So after merging the two questions we could ask: “What is truth, what is purity?”.
Truth, absolute purity has to be something objective, standard, something that is not affected by our inherently self-serving, self-justifying, egoistic and subjective point of view. Such truth, purity is Nature’s most fundamental force, principle that is capable of creating and sustaining life by maintaining balance and homeostasis in the fully integrated and interdependent, cosmic Natural Universe.
So what is “true, pure happiness?”
It is a reward, consequence, a positive emotional impression as a result of reaching the perception, the “taste” of absolute truth, purity.
How can we reach this absolute truth, purity and the resulting happiness?
Only through following Nature’s law of “similarity of form”. We can only discern, research, attain anything if we “clothe” into that something, by acquiring matching qualities, frequency with it.
We can do so by practicing and acquiring – through “habit becomes second nature” – the qualities of selfless, unconditional love and service of others in a closed, purposeful, mutually supportive, mutually complementing Human environment. Then through those qualities we “clothe into” Nature’s primary principle, sensing, “tasting” it by the virtue of acting like it.
Then through this similarity we understand reality’s absolute, pure truth, existential law, and as a result we feel an overwhelming contentment, infinitely pure happiness flooding us.