Why was the oath so important to the norman's?

Answer 1

1st AnswerTo protect faith (catholic) and honour 2nd AnswerIn the middle ages, an oath was something different than it may be today. It was not an irreverent word. It always included a promise, but it was not merely a promise; it was something sacred. It was taken before God, on the sacred scripture or on the relics of a saint. Violating it meant dishonor, possible excommunication, and the potential for big trouble in the afterlife. In the middle ages, people were taught, and most believed, that a person's word was more important than that person's life. This was not merely true of Christians, but of nearly all people, regardless of faith. It was certainly true of Jews, Muslims, most pagans, and even most heretics.

Answer 2

because they take oath like a god