Changing/working on ourselves is one of the hardest things we can do. This is why so many people with depression/anxiety/etc don't seek out help. They actually get comfortable in depression. Depression becomes familiar and the idea of trying to live any other way seems impossible. Try to shake things up in their environment first, then change seems more manageable. For example, rearranging furniture in their home or bedroom. Suddenly you're not looking at things in your home the same way, and the idea of making other, more internal changes may come easier to you.