When faced with complex issues in life such as success or relationship, no one can give you 100% of the right formula to succeed (including me). Simply put, a successful person who follows his passion will say "follow your passion to success", while a successful person who does not follow his passion will not say that.
When listening to a counsel from a successful person, we are always blinded by "bias", we consider a successful person to be right and can not be wrong.
The cliche example is the advice about success that says we have to take risks in order to get rich, because even if we fail we will get a valuable experience.
The problem is that some people can "handle failure" and others can not handle failure, what about people whose lives are mediocre or are bankrupt and difficult to survive? Do they have to take risks? If they succeed, they will boast of "take the risk to success", while those who fail may get worse into homeless, starving to death or even becoming thieves.
This is a biased survival in which we tend to believe in someone just because they are the winners. Though there are two things that are most influential and the funny is rarely discussed in the advice of success is the circumstance factor and luck.
The same is true in love (relationship), career, friendship, and others.