Walking on a path full of the afterglow of the sunset, you can hear cheerful birds singing, and you can be sure that your ears can hear any sound on the earth, which is happiness.
Through a flower path, you can smell the fragrant flowers and make sure that your nose can smell any kind of wonderful smell, which is happiness.
When you meet someone you like, you can say a few words to him and make sure that you can still spit out beautiful words. This is happiness.
Open your arms, you can hug the person you want to hug, and make sure that your arms can also embrace the world, which is happiness.
Walking briskly, ensuring that your arms can walk and run obediently, this is happiness.
In fact, happiness is very simple.