Complex sentence: Although this motto is widely understood to be a quotation from Matthew 19:26, in 1998 Mastronardo attributed the motto to his mother's favorite saying and claimed that he had been unaware of its Biblical origin.
Split into simpler sentences: Although this motto is widely understood to be a quotation from Matthew 19:26, in 1998 Mastronardo attributed the motto to a saying his mother used frequently. He claimed that he had been unaware of its Biblical origin.