I don't agree. That's a little like saying, "If your purpose is to be fit and healthy, then just be fit and healthy! No matter the circumstances, be fit and healthy!" Or "If your purpose is to be educated, then just be educated! No matter the circumstances, be educated!"If your purpose is to be happy, then just be happy. No matter the circumstance, be happy!
But being fit and healthy, or being educated, isn't something that you can just decide to do, and suddenly it happens. You do things, project by project, step by step, to make it happen.
The same for being happy. Happiness doesn't come on command.
Like "a pursuit which has you feeling healthy"? Or "a pursuit which has you feeling educated"?It means "a pursuit which has you feeling happy".
Again, I disagree. Happiness, and health, and education, and countless other personal changes, require work and projects and steps.