It’s obvious you care a great deal for your church member. The Lord has reasons of His own for allowing such difficult circumstances to enter our lives, though we have no way of knowing what His purposes are in permitting this trial. But I'm certain that He cares for Peter and wants us to pray. I'll be praying for our Heavenly Father to heal him, according to His will and timing, and surround him with His peace. Grace and peace to you.