When we see a flower like Rose, our eyes gets struck at the flower itself because it attracts. When we try to pluck it from the rose plant then we came to experience or know that there are thorns too. Because our focus is on flower we could not see the thorns. Rose has a purpose and the thorn has a purpose. The thorn protected it, for you, get eaten away by animals! It is like army for a country so that people can live peacefully. The same branch gave nutritions to rose and the thorn. The same stem carried the nutrients from roots to the branch. The same roots collected the nutrients from soil and same light and air processed it.
In the same way we are serving different purposes of life as human being. The same local body is serving us. The same state is administrating us. The same country is protecting us. The same light, water, the Earth+Sun or universe and air or space is providing enough resources to every country. Every part has a purpose and a blessing. Blessing for thorn is that no one tries to pluck it, so it is saved from the pain of being plucked from its very source!
As a human being we can understand it by serving people selflessly.