But change is the law of nature; one cannot stay forever with his loved ones or in their comfort zones, at times one has to leave your comfort zone either forever or for some day.
Now the poet is speaking to those who are far away from their comfort zone. These people are sad and lonely because either they are alone in an unknown and unfamiliar place or they are missing their loved ones.The poet feels sympathy towards them and ask them not to consider themselves alone. He says the entire world is by their side and shares their pain and sorrows. In the sense he is not the only one suffering from separation. There are many people out there in the same situation. Separation is a part of life. Everything is important in life, even the experience of separation which teaches us to be strong and self-sufficient.
There is a saying that when a person dies, he/she takes the form of star. This is the reason the poet ask the person feeling alone and unsecured to stop feeling that way and look up at the stars know they are not alone. The person they are missing is right there watching them. And when you realize the person you are missing is near you, you feel better and are is able to sleep deeply.
We cannot sleep until and unless we are truly free within and make peace within ourselves. When a reader reads this poem, he sees himself save in the cradle of life with millions of stars above sharing his pain and loneliness. This poem acts as a sedative to that what is unable to sleep and helps in creating inner peace.