There is a BIG difference between WALKING & TALKING!
The difference between knowledge & wisdom is action
This is a clip of a scene from my all time favorite movie: Peaceful Warrior, that does a good job of portraying this message.
(I highly recommend the book Peaceful warrior which may be found in the book store as well)
The message is simple, it is impossible to know any experience other than those you have down been through yourself.
In reality you can and will NEVER know anyone or anything except yourself, anyone who thinks otherwise is lying to themselves.