I personally would half-disagree. In my opinion, there are universals truths to how to live properly in many instances. Sometimes we don't like to accept that though. We like to live how we wanna live. This is generally based on our limitations of wisdom.
IMO, there are few universal truths, but yes, there are some.
I dont believe that they are: practice yoga, eat only "organic" foods, dont study for a business degree, only work doing what you love to do, live your life exactly how I live mine.
I do a few of those things myself, but I dont believe that someone who doesnt will not have the ability to be happy in their life.
YMMV

