Today I was thinking about the second luminous mystery in relation to the question: why do we pray? It has been explained that Mary changed the course of God's plan by requesting Jesus perform the miracle (water to wine at the wedding). So, are we attempting the same through our requests? Or are we trying to prepare ourselves to accept God's will through our prayers? I really don't know the answer. Prayer changes us, but does it change the course of natural events?
@Gabriel
Yes it does if it's He will it.