How are depression and disillusionment alike dislike?

Disalike:

Depression is a mental, physical, psychological health condition, often related to tramautic or stressful life-changes for an individual. Typically these changes are unwanted, and the person has difficulty developing coping mechanisms. Disillusionment is a state of mind, that does not necessarily affect one's immune system in the way that depression does. A person who is disillusioned may be perfectly healthy in other ways. Disllusionment is not the cause of depression. A person with depression may actually have an accurate mental interpretation of the things he/she relates to being depressed about. It is often said that depressed are negative in their thinking, and while this may be true, this does not garner whether or not they are accurate or disillusioned. Likewise, a positive person may be dissillusioned, and their disillusionment may be what keeps them happy! It is possible to be happy and dissilusioned, and it is also possible to be depressed and be dissillusioned. Yet it is also possible to be happy and be accurate, and it is also possible to be depressed an accurate. Alike:

Both deal with mental processes, and the persons ability to cope with their mental process. Although depression is not only neurological, it is also physical. Whereas dissilusionment is purely mental. The similarilties pretty much end there. With both of them being neurological, brain activities. Keep in mind however that it is possible for people to be both depressed and dissillusioned, or accurate and depressed, or dissilusioned but not depressed. They are not necessarily inter-related.