Only God Knows Who Are His. The starting point has to be that God is the only arbiter of who is and who is not a Christian. We can draw our lines where we will, but we will be wrong.
Neither cluelessness, nor unbelief, nor hardness of heart, nor murderous anger, nor human injustice nor even death itself could frustrate His work. Jesus’ faithfulness, His work and His Gospel were all vindicated when He walked out of His tomb alive. And while the world of humanity has continued for the most part in rebellion against the Creator, increasing numbers of men and women and children have heard of what Jesus did and who He is and of what He continues to do in our midst. These people are tasting and seeing that the Lord is good, their lives have been touched by the love of the holy Trinity, their own priorities and way of life are being transformed.