The Qur'an is ... a Book which contains a message, an invitation, which generates a movement. The moment it began to be sent down, it impelled a quiet and pious man to ... raise his voice against falsehood, and pitted him in a grim struggle against the lords of disbelief, evil and iniquity... it drew every pure and noble soul, and gathered them under the banner of truth. In every part of the country, it made all the mischievous and the corrupt to rise and wage war against the bearers of the truth.