Representational Imagecreative commons/Julie Lackey

'Happiness is a basic human right', musician Pharrell Williams tweeted on Thursday, a day ahead of the International Day of Happiness.  

While the definition of happiness is flexible and relative to each person, the fact that it should be a basic right cannot be stressed enough. 

The United Nations declared 20 March as the International Day of Happiness in 2012, when it said that "the pursuit of happiness is a fundamental human goal". 

The value of happiness has been understood since ages, and has been immortalized in some timeless quotes, some of which we have listed below: 

Happiness is when what you think, what you say, and what you do are in harmony.

             - Mahatma Gandhi

Happiness can exist only in acceptance. 

             - George Orwell

No medicine cures what happiness cannot.

 - Gabriel Garcí­a Márquez

Happiness is not an end — it is only a means, and adjunct, a consequence.

             - Dinah Craik

True happiness is... to enjoy the present, without anxious dependence upon the future.

             - Lucius Annaeus Seneca.

Happiness is a butterfly, which when pursued, is always just beyond your grasp, but which, if you will sit down quietly, may alight upon you.

            - Nathaniel Hawthorne

It is not easy to find happiness in ourselves, and it is not possible to find it elsewhere.

            - Agnes Repplier

Happiness is like a kiss. You must share it to enjoy it.

           - Bernard Meltzer

Happiness is a warm puppy.

- Charles M. Schulz

Sanity and happiness are an impossible combination.

- Mark Twain