From the Bible, Luther formed firm ideas about families. Luther knew that what a child learned at home would greatly influence his life. He said in "Table Talks", "Sermons very little edify children, who learn little thereby; it is more needful they be taught and well instructed in schools, and at home, and that they be learned and examined what they have learned; this way profits much; 'tis very wearisome, but very necessary". Luther also preached against the Catholic Church's demands that ministers cannot marry. After hearing his preaching, many nuns wrote to him to ask for help in escaping their convents. Luther helped nine nuns escape from a convent. On April 4, 1524, Luther had a friend help the nuns sneak over the wall and then hid them in barrels on a wagon until they were out of the city. One of these nuns was Katherine von Bora.