The Gospel Preached

This is all of the known world, wherever the gospel is preached it results in fruit, real evidence of the power and effectual working of the Spirit of God in the hearts of God's elect. This fruit is not of a temporal nature, it keeps on bearing fruit. What gospel should be preached to the unbelieving? What gospel was presented to the woman at the well in John 4? Is it different than the gospel preached to the believing? Something we often forget is that those who are saved under our preaching or witnessing are only manifesting the work of regeneration already performed in their heart by the Holy Spirit.