There are billions of people who inhabit the earth as we know it today. That is a fact of life. When it comes down to our personal relationships one can only let so many people into the personal world that we claim for better or worse. The world of who we really are, and a world where we cannot hide our true self. These are the people of our inner circle of life. Those who know where the skeletons of past misdeeds are buried.
The inner circle for most of humanity would be the family that we are born into. As our social lives progress we will meet other people through school or in the modern world social media. One can now interact with millions of others across the internet with the touch of a keyboard. There will always be a need for an inner circle of others who we will both influence, and will be influenced by. That is the circle of life that we all know. When one thinks about life and relationships we can only know our personal inner circle.