Reading some more in Jurgen Moltmann's autobiography, and he recounts his conversion experience through the hospitality he experienced in a POW camp in Scotland (WW2) and reading the Bible, this section from Psalm 39:
I am dumb and must eat up my suffering within myself.
My life is as nothing before thee. . . .
That was an echo from my own soul, and it called that soul to God. . . . Then I read Mark's Gospel as a whole and came to the story of the passion; when I heard Jesus' death cry, 'My God, why have you forsaken me?' I felt growing within me the conviction: this is someone who understands you completely, who is with you in your cry to God and has felt the same forsakenness you are living in now. I began to understand the assailed, forsaken Christ because I knew that he understood me.
A Broad Place, 2008, p 30