I am not sure I know what sanity is at times. But I do pray all the time. The prayer mentioned above is similar to one that I pray from the Orthodox Study Bible's morning and evening prayers.
I also pray: "Lord Jesus Christ, have mercy on me, a sinner"
But honestly, I also pray: "Please Lord, heal my husband in body mind and spirit and heal me in body mind and spirit. Also, Lord, please heal our marriage and bring him home to me."
I keep praying that. I pray it all the time. (I pray so much, I wear a kercheif on my head.)
My neighbor is RCC (and we are very good friends). She has been praying for me. She said she had a dream in which my husband came home. It was the same night that while I was laying in bed unable to sleep and had decided to just keep repeating the prayer above until I fell asleep. While doing so I had a sudden surge of energy inside and this "feeling" that he will come home.
Maybe the enemy is playing tricks on both my neighbor and me. But it does give one hope.
(I accept the will of God. If my husband does not return to me, it is because God is protecting me from more pain, or in some other way advancing the Kingdom of God. So, while I might be disappointed. I will not allow anything to seperate me from God's love and my love for God. (using "God" in reference to the trinity.)