"This is a sentence that Mary embroidered on her family cloth in an English prison, and it is also a theme throughout her life. It symbolizes the eternity of life after death. Mary may have been inspired by the emblem adopted by her father-in-law Fran? Ois I of France: Newt. The salamander spontaneously ignites at the end of its life and then rises from the ashes of rebirth ... "
According to this, her inspiration for this sentence may come from her father-in-law's father ... the salamander spontaneously ignited at the critical moment of life and then reborn from his own ashes.