Question everything. It is one sure path to the truth about the world and about yourself.
How?
Try this: Assume what you read, see, and hear “out there” is the opposite of what is true. Watch how your mind rebels as its cherished beliefs about what is true, good, and right are challenged. You may experience strong feelings arising in you as well. This is your indication you are on a very useful path of inquiry. Don’t stop because your mind and emotions don’t like what you are asking of them!
Keep going.
You are heading towards your freedom, because the truth really does set you free.