I have felt this quite strongly within my own body. Fear, anger, sadness etc. have an effect of ‘twisting in’ upon oneself (what I imagine ‘torsion fields’ do); as if you are closing and retracting in upon yourself. Your body, mind and emotions stiffen and become really dense. Imagine all the oxygen and nutrients this effect denies for your body. On the other hand, love, joy and peace have the opposite effect, creating a sense of ‘expansion’ – as if your heart is spreading out in all directions. The body then becomes ‘light’ – less dense. Is this ‘expansion’ of the heart the thing which creates angels wings?