Prayer for my son who is recovering from a mental illiness

My son who is in his 30s, was diagnosed with bipolar and it left him with bouts of deppression. He is trying to lead a fairly normal life by going back to work and look after himself, but most of the time he is depressed which is not easy for family to spend time, communicate or support him as we would like.

I am a christian mum and it hurt to see him suffer like this especially when he thinks God did this to him. He was a saved christian before the condition struck and I just pray day and night that his salvation and trust in God will be restored again as Jesus is the Way theTruth and the Life.