The religion of Islam is a religion of moderation between excessiveness and negligence; it is the straight path. And within the book (the Quran) and the Sunnah (the prophetic narrations), there are many religious texts that command adherence to this middle path and forbid extremism. These texts either mention extremism explicitly, or often with wordings that indicate its impermissibility such as prohibiting aggression, oppression, extravagance, delving too deep into matters, or harshness.