Merton is a gifted writer, and his descriptions of growing up in Europe are interesting. Much less interesting are his spiritual/religious judgments of others. These judgments seem to break down along the following lines: 
 If you're a bad person, and are not Catholic, the reason you're bad is because you're not Catholic. 
 If you're a bad person, and are Catholic, the reason you're bad is because you're not Catholic enough. 
 If you're a good person, and are not Catholic, the reason you're good is because you hang around with so many Catholics. 
 If you're a good person, and are Catholic, the reason you're good is obvious. 
 I didn't expect anything but a pro-Catholic stance from Merton--he was a Catholic monk, after all--but some of his takes border on religious bigotry. In one passage he praises the prayer-work of a group of monks, stating outright that the reason the United States is a successful nation is because this small group of cloistered guys in upstate New York prays on a daily basis. And he means this not in some abstract "it takes all kinds to make the world go round" way, he means it literally. The monks pray, God hears their prayers and responds, and that's why our country is blessed. No other reason. Then, not two pages later, he has the gall to criticize someone else's religious practices as "obviously silly." 
 I would have found his tale more enlightening if he had turned his perceptive talents on those aspects of Catholicism that are "obviously silly" and then described how in spite of them he was able to grow in his faith.