Repetition in the Doctrine and Covenants (Come, Follow Me)

 In this week's Come, Follow Me reading (Doctrine and Covenants 12–13; Joseph Smith—History 1:66–75), we see in section 12 some of the same phrases we read in earlier revelations.  I have sometimes wondered why we see so many repeated phrases in these early sections of the Doctrine and Covenants, but it's not so surprising when I consider how much repetition we see throughout the scriptures.  

For example, how often have we read that if we keep the commandments, we will prosper in the land?  In other places, we see the same verse repeated once and sometimes twice.  

It seems to me that when the word of the Lord is repeated, I should pay close attention.