Frustrated in a crippled body

A friend of mine suffered a stroke recently.
That left him with his left side not able to function normally.

I visited him a few times.
In every visit, i realized that his confidence level is dropping significantly.
There were a few times, he would slip into depression in various degree.

He would spiral downward mentally and convince himself that he is a burden to his family & he can't lift a finger to help his wife & he has become a useless person and he has lost his authority as a father. This thought kept running within his mind and he wasn't looking forward to the next day. In fact he dreaded the next day as he was tired out by these same old thoughts running wildly in his mind.

He is trying to pick himself up and be strong for his family. But physically, he knew the brutal fact is that he gets tired very easily and he is limited in many ways.

it was also a real test for his marriage though his marriage with his wife really stood through the test of time.

How can we help to raise his confidence or even to walk out of his depression when his experiences are so real in his life??