Few things in life are more painful than watching helplessly as a loved one suffering from dementia slips into oblivion.

Glen Campbell was diagnosed with Alzheimer’s in 2011. He has released his final song, I’m Not Gonna Miss You, in which he chronicles his battles with the disease and says goodbye to family and fans.

Watch the video below and perhaps consider making a tax-deductible donation to the Alzheimer’s Association to help fight Alzheimer’s disease through vital research and essential support programs and services.

“I’m still here but yet I’m gone/I don’t play guitar or sing my song/It never defined who I am/The man that loved you till the end/You’re the last person I will love/You’re the last face I will recall/And best of all…I’m not gonna miss you.”