There is a great by-product of mindfulness meditation which is that we all become more contented because we remove a lot of emotional stress from our lives through the simple action of meditation.

Here is a link a to a great scientific study and article which claims to be able to recognise ‘happy body cell’s’

http://www.theatlantic.com/health/archive/2015/02/what-a-happy-cell-looks-like/385000/