Humanity is not a straight line which can't touch the other part. Instead it's completely intertwined. Our lives are all inter-connected. No man can live by himself alone. No man is an island.
An island in today's world is not self sufficient. It needs to import most of its needs. In the same way a man is dependent on so many others. He can't live in isolation. No man is an island.
We need to understand and value the need of others. Only when we do that, we refine our humanity. Humanity understands others. It never isolates. It unites. Don't try to form an island. Unite. No man is an island.