The phrase, the pursuit of happiness, would suggest it is a continuous effort and not a feeling or state of mind set in stone, found once and then locked away for safety.
Finding your voice
A chance encounter. You speak and someone is listening, paying close attention. Someone thinks what you are saying is worth listening to. Quite possibly your audience is less experienced in life, just as likely that they are not. They've formed an audience around you all the same, the reason being that you have something to say which resonates.
Imagine yet, if you will, all the things you hold dear in the world – in arts, in science, the greats: Einstein, Chopin, Picasso, Jay-Z (and no this isn't tokenism to hip-hop.) Imagine if they never got started. Imagine if they stuck to their doubts. Imagine if their doubts (which they most certainly had) had crippled them.
What is success?
Plan towards your success by all means, but then take time to take stock of that which you already have. It might just bring you happiness.