Validation

Why do we seek to validate ourselves with those around us? It's something that we all suffer from. Even those that try to be as far from society as possible still try to make everyone see why they're doing so. I write on my blog for the purpose of the enjoyment of others, as well as to validate my own opinions and views of the world. If I never posted this, would it create a paradox? Would me writing about outward validation conflict with keeping something to myself?