A sense of uselessness about yourself? (watching them suffer)? or a sense of uselessness from the person who is suffering? Either one, of course will be detrimental to well being. Worry is basically negativity, a poison, like bad energy. I personally believe in the trasference of spirits, both negative and positive. In times of trouble it's important to keep negativity out at all costs!.. It only slows the process of healing. It's so important to Pray for help from God, for His peace.