The Good Shepherd
I am the good shepherd, and know my sheep, and am known of mine. As the Father knoweth me, even so know I the Father: and I lay down my life for the sheep. And other sheep I have, which are not of this fold: them also I must bring, and they shall hear my voice; and there shall be one fold, and one shepherd.
- John 10:14-16 (KJV)
Most would agree that the sheep are Israel, and that the other sheep are the Gentiles.
However I think it's also possible that in the end times, the sheep refer to the Christians, and that the other sheep refer to the sheep still captive in Babylon churches (churches with false teachings).
That's why Revelation 18 says:
And I heard another voice from heaven, saying, Come out of her, my people, that ye be not partakers of her sins, and that ye receive not of her plagues.
- Revelation 18:4 (KJV)
Those that hear His voice, will come out of the Babylon churches, and there will be one flock and one shepherd. This process is also known as the falling away.
Let no one deceive you by any means; for that Day will not come unless the falling away comes first, and the man of sin is revealed, the son of perdition, who opposes and exalts himself above all that is called God or that is worshiped, so that he sits as God in the temple of God, showing himself that he is God.
- 2 Thessalonians 2:3-4 (KJV)
I strongly believe that the SDA church (the Seventh Day Adventists) are the true end times church (no matter how asleep it seems).