I have two suggestions. The first would be to make certain your father-in-law's physicians knows the severity of his symptoms. It's possible there is a medication or other treatment that may provide him some relief. There's another possibility that it's not his depression that's causing him to sleep for extended periods of time. Secondly, since your father-in-law has suffered with depression for so long, it's possible that the thought of getting out and doing activities overwhelms him. If what you're suggesting doesn't appeal to him, the likelihood of him agreeing to participate is not good. Perhaps you could start smaller. Does he respond to animals? Maybe a sense of duty to care for an animal would help him engage with something/someone more rather than sleeping so much. Maybe he would respond to a new hobby? Does he sleep as much when visitors come to his home? Perhaps a routine visit with a friend/family member/neighbor would help him engage more.

A friend of mine has a similar problem with her dad. The siblings take turns calling him or visiting him with specific requests or questions for him... Expressing a need for him to help them in some way. Even pretty inane things like, Dad, can you tell me what the mileage is on the car.

In addition to what Missy said above, I'd also suggest that in the face of feeling overwhelmed, set a time frame for it. "Let's walk just for ten minutes, and then we can be done." In this way there's no open-ended feeling of "It's too much to commit to" and instead there's a definitive stopping point. In my experience, he'll come to find that ten minutes felt good and that fifteen might be great next time around.

It sounds like your MIL has resigned herself to his condition and that he is so immersed in it that he doesn't think he can participate in anything, such as the senior center. Perhaps you can get his physician to help. He could refer your FIL to a specialist that can determine his medication and/or therapy. All of the previous answers above are great.

My BF suffered a stroke. He's in his 50's will require 24/7 attention for the 30-40 years. His situation has led to depression. He won't discuss his therapy. No, we can't do what we used to, but I have pushed his HHA to take him out for air, or for coffee. Simple, close to home and low stress levels. I take him out for a couple of hours on the weekends. He usually finds it lifts his mood, even if it's a bit.

I'm at a total loss. My hubby has Schizophrenia, emphysema, Barrett's esophagus, & other med. problems. He's alone way too much. He's tried working part-time, hobbies, etc. He's still not active enough & alone way too much. One can only be there so much.....someone's gotta work! His family isn't there enough, or, he refuses to go. This is how people slip through the cracks. It's very sad. "You can lead a horse to water, but, you cannot make him drink". So true!