Barriers are those things in a culture that hinder the spread of the true gospel, spiritual renewal and/or church growth.
They must be broken down, overcome or circumnavigated so that each person has the opportunity to hear God's Word and the great news of Jesus Christ.
For though we walk in the flesh, we do not war according to the flesh, for the weapons of our warfare are not of the flesh, but divinely powerful for the destruction of fortresses. 2 Cor. 10:3-4
Pray that the barriers to the gospel be overcome so that people have the opportunity to accept God's grace and mercy shown at the cross.