The poet means to say in these lines that it is the same land on which we walk and tread. After our death, we would be buried in the same earth. Through these lines the poet tells us that we do all our activities on this same land. We get food for our survival from this same land. We make our houses on this land and we get many other things from the same land. Therefore, why should we consider some as strangers? No one is foreign or strange. We live in the same house or universe as a family.
Then why do we create discrimination against some people? Why do we fight with our brothers? It is all because of our greed to get more wealth and power. We want to have more wealth and power than others. In our quest to fulfil this desire, we fight with others and hurt them. The poet also tells us that one day all of us will die. Nothing would remain ours. We cannot take any of our possessions with us. We will have to leave all things on this same earth. Finally when we die, all of us will be buried in this same earth.
‘All are alike. ’