From a life-force-energy point of view, I find this article fascinating. People describe a heavy feeling as if they are climbing Mt Everest. Guilt, anger, jealousy, anxiety, sadness are all low vibrating energies. People with depression literally have low life force energy and they feel it physically. Traditional treatments for depression can help, but I would also add Reiki or some form of energy or spiritual healing to the mix so that mental, physical AND spiritual symptoms can be addressed and balanced.