This beautiful quote tells us to look into nature and learn the good things from it. Nature has many things to teach us. Like when we have a bad time we feel sad and our mood goes off and we don't want to do anything. If we look at the nature lets say a tree in the autumn season loses its leaves, it doesn't feel sad because it will be soon going to get new leaves. Similarly, we shouldn't be sad at hard times and feel stronger with the hope that this time will fly away and the good time is very near.