The hardest part is to realize that your assumptions about most of the things out there are probably wrong or incomplete.
What makes it even harder is that you'd have to actively gather new information to complete, validate or invalidate what you believe in.
And here comes the biggest problem...
The internet has become the world's largest validation machine.
It only shows you the things you want to see.
The things you want to read.
The things you want to watch.
And the things you want to listen to.
It ultimately validates your view of the world.
Instead of challenging it every once in a while.
But here's the good news....
It works both ways.
Once you've started using it to challenge your current worldview, it will keep challenging it.
Until you'd have to start all over again...