The Pains of Parkinson's Disease

My dad has Parkinson's disease. I've knew something wasn't right when I came back from Kansas in 2012. His symptoms were atypical but mom and I both knew something was wrong. He was properly diagnosed about 2 years ago. He doesn't have the typical tremors but instead it presented with a loss of strength on his right side. It's been getting worse ever since. It's very hard watching somebody you love gradually lose control of their body and their cognitive abilities decline. Having to help your mother get your father to the bathroom is heartbreaking. I know this is part of life. The decline of one's parents is a natural normal thing. That doesn't change the frustration, anger and helplessness of the situation.