Isaac was not born through immaculate conception. Abraham and Sarah had to participate in the union of marriage in order to have Isaac. In one respect, they created an Ishmael by trying to make the prophetic word come to pass, yet they still had to co-labor with God to see His promise become a reality. We need to realize that God seldom does things all by Himself. He often requires us to be involved with Him to see our destinies fulfilled. The key here is to allow the Holy Spirit to show us what part He wants us to play and what part God has reserved for Himself. Otherwise, we will create Ishmaels who will persecute our Isaacs!