Everyone believes something.
Some give this more thought than others and develop a consistent set of beliefs, while others take the buffet table approach – choose and take what you like and if it no longer serves or pleases you, leave it aside and don’t bother picking up after yourself.
The household in which German theologian and anti-Hitler conspirator Dietrich Bonhoeffer grew up fell firmly in the former camp, having a lasting effect on the children’s futures as their accomplishments demonstrate.* Lazy thinking and not practicing what one professed were not tolerated, as Eric Metaxas shows us in Seven Men: And the Secret of their Greatness (Thomas Nelson, 2013):
“Karl Bonhoeffer taught his children that having a remarkable IQ was of no use if one didn’t train one’s mind to think clearly and logically. As a scientist, he believed that was of paramount importance. One must learn to follow the evidence and the facts and the logic all the way through to the end. Sloppy thinking of any kind was not tolerated in the Bonhoeffer household. One would surely think twice before opening one’s mouth at the dinner table because all statements would immediately be challenged. This early training in how to think was at the core of the Bonhoeffer children’s upbringing, and it was one reason that Dietrich grew up to have the tremendous impact on those around him that he did.
“Perhaps even more important in the Bonhoeffer family was acting upon what one said one believed. One must not only think clearly but must prove one’s thoughts in action. If one was unprepared to live out what one claimed to believe, perhaps one didn’t believe what one claimed at all!” (92)
* According to Metaxas, Dietrich’s father, Karl Bonhoeffer, was “a scientific genius and the most famous psychiatrist in Germany for the first half of the twentieth century,” while his wife Paula was a brilliant teacher who earned a degree at a time when few women did and homeschooled all eight of their children. Then, the eldest brother, Karl Friedrich, became a physicist who at 23 participated in Max Planck and Albert Einstein’s splitting of the atom, and the middle brother, Klaus, went onto head the legal department of Lufthansa. Their sisters, meanwhile, also were “brilliant and married brilliant men.”