Having declared that angels have transmitted the message that the Messiah will come, now the faithful only wait to have angels declare that the time has come. Alma says that he wishes it could be in his day, but that he is content to have it happen in the future.
What is important is that it will happen. The words of all of the faithful priests that he has been speaking about will come true. Thus, the people of Ammonihah should understand the scriptures that they profess to believe, and accept the message of the coming Redeemer.