We talk and talk about training children up in the way they should do, but Bonhoeffer was unchurched, for the most part, as a child and youth. Don't confuse unchurched with non-religious, since that was not true, and there were several relatives who were pastors, including his grandfather and great-grandfather, who were also professors. But Bonhoeffer didn't even go to church regularly when he was studying theology! He doesn't seem to have considered church an important concept until he came into contact with the Roman Catholic church when he studied in Rome. Wow!