Heart and mind

http://www.metaphysics-for-life.com/spiritual-heart.html

http://www.unconditional-self-acceptance.com/heart_centered_metaphysics.htm

https://www.youtube.com/channel/UC7JlxEJ2LGFOk3RTMQPafJg

https://www.ekhartyoga.com/articles/chakra-series-anahata-or-heart-chakra

http://www.chakras.info/heart-chakra/

https://www.youtube.com/watch?v=1rZS7F-7sDY