The real key to health is....

...happiness!

“When I was 5 years old, 
my mother always told me that happiness was 
THE key to life. 
When I went to school, 
they asked me what I wanted to be when I grew up. 
I wrote down ‘happy’. 
They told me I didn’t understand the assignment, 
and I told them they didn’t understand life."       
                                                        - John Lennon