If God wants his "institution" to be organized, why didn't he send the prophet earlier than Moses or Abraham so that both of them will know the book and both of them will be following the same path. And why did he gave us freewill? He could've created us to be like the angels who knew him from the start, and just do whatever he wills. Why would he send a prophet in the past to decide the salvation of the future? What happens to those who had come before him who haven't read the book? What difference does it make, they also don't know the prophet then? Since the prophet only lived in the Middle East, what happens with those people who lived on the north, south, west and eastern part of the world during or prior to the prophets time?

It's not because things are difficult that we don't dare, it's because we don't dare that makes things difficult!