Micah was a prophet to the Southern Kingdom (Judah). He prophesied at the same time as did Isaiah. There are some interesting similarities between the books of Isaiah and Micah. Compare Isaiah 2:4 and Micah 4:3 and you will see a very direct similarity.
The prophecy in Micah 5:2 is amazing. This verse foretells of the coming of Christ over 700 years before His birth. Equally amazing is that we learn that Christ is from of old, from everlasting. Christ was present before Creation, and therefore He was not created. He is everlasting God, the Son. Rather than being a part of creation, Christ had a part in bringing creation into existence.
Another interesting possibility is that Christ may have been the one that walked with Adam and Eve in the Garden of Eden (Genesis 3:8). Christ’s ‘goings forth have been from of old’ (Micah 5:2). So when you place your faith in Christ, you place it in the one true God, the Creator of heaven and earth. The Creator is from of old, from everlasting.