So part of our challenge is reconciling these two seemingly irreconcilable truths -- that war is sometimes necessary, and war is at some level an expression of human feelings.

CNN: Obama: 'Peace requires responsibility'

Psychologists and criminologists would later speculate that West was a sociopath - unable to feel normal human feelings or empathise with his victims, possibly due to a brain injury he had suffered in a motorbike accident.

BBC: The chilling voice of Fred West

The harmonica has long been regarded as the humblest of musical instruments, and yet, as Mr. Thielemans and Mr. Maret show, when played at its best, it is more than capable of expressing the deepest feelings in the human experience.

WSJ: Playing Hand to Mouth | By Will Friedwald

The music reflects one's inner feelings when travelling alone, connects a human to nature, and serves as a performing art.

UNESCO: Culture

An international research team at Oxford University found that when people laugh hard, the kind that leaves them almost physically exhausted with tears in their eyes, the human body triggers the release of endorphins that help reduce the feeling of pain and promote feelings of general well being.

FORBES: Laugh Your Way To Loving Your Job

In human beings, it was found that mirror neurons not only simulate actions, they also reflect intentions and feelings.

FORBES: The Art and Science of Mirroring