Jacob prepares the people to receive the words of Zenos by assuring them that the Spirit of the Lord speaks plainly of thing as they really are and as they really will be. Prophets often try to speak plainly, in a way that people can understand. Although the prophecy of Zenos will be long and detailed, it covers a lot of ground and does so in a plain manner that ordinary people, most of whom were small plot farmers, could relate to, agree with, and also obtain a testimony of this prophecy’s truth.