Words that have pretty much the same meaning?
synonyms Figure of speech-Tautology
First you have to clarify what you mean by happiness. But we are Satchitananda - sat meaning being/existance, chit meaning consciousness, and ananda meaning bliss. We are bliss and happiness...and so is God...so realize who you are or find God (which is pretty much the same thing in the end). ~ Eric Putkonen
The complete answer to this question is the same as the 'meaning of meaning', combined with 'the meaning of "truth"' then, what is the correct action after that truth has been discovered. Pretty much 'life'. Strictly speaking, however, you speak of epistemology (determining truth) then ethics (knowing truth), then morals ('doing' truth)