We all know that the strongest wins the weak, but the weak can still find ways to survive. Therefore, w must know how to adjust to survive our life.
We see from documentary that in the North Pole with weather below fifty degrees, many animals live there to spend their life in the severe winter. They have to struggle to find food every day from all white iced land. But, they can live on because they know how to adjust themselves how to live.
On the other hand, a desert under fierce sun as hot as a fire-place, still many animals live there. During the day they live under the sand, and in the night they come out to find food. But, we cannot understand how can they live below the sand without air. It is because they know how to adjust their life to survive.
We, human with wisdom, of course, have many ways to live safely under the severe weather of cold or hot weather of fierce sun. But, what we feel the difficultly to live a life happily is the keen competition among the human world.
We can be wiped out by the strong ones from any circumstances we are in. But, we must have confidence that if we cannot be a big tree, we still can be a tiny grass. A big tree can be broken by a strong storm, but tiny grass can survive under any weather and any condition because the root of a grass is under the ground which protects the grass to survive forever.