How do you know that you are reborn of Spirit? This is by far one of the most profound questions in Christianity today. We have so many different denominations stating many different things. I know that this is a large debate, but go ahead and post your position alone.

My question revolves around assurance for "born of the spirit." How can somebody be absolutely assured that they have the Holy Spirit living inside of them?
You will know that you are reborn in spirit when people notice a significant change in you. It's like being hit by a large truck, you are never the same afterwards. The same can be said for the spirit of God entering your life, God is unimaginably big. If you have been truly changed and born again, people will take notice. 

I know people that get saved and they don't even physically look the same anymore. Instead of hurt, you see love in their eyes.