There are certain things in life that you can’t change or predict:
Solar System, Sun, Moon, How a tree looks, How a baby is born, How to see, Unpredictable situations
There are certain things you CAN change:
How you live, Making people around you happier, Writing a BLOG, Being a little more friendlier, Adopting a dog
So, Change what you can, and don’t stress about the situations you can’t.