I agree with Posthuman, they are addressing, all the Disciples of Jesus Christ, however SOME OF THEM ARE NOT SAVED.
In the Parable of the Gates:
Matthew 7:13-23 (NASB)
13 "Enter through the narrow gate; for the gate is wide and the way is broad that leads to destruction, and there are many who enter through it.
14 "For the gate is small and the way is narrow that leads to life, and there are few who find it.
15 "Beware of the false prophets, who come to you in sheep's clothing, but inwardly are ravenous wolves.
16 "You will know them by their fruits. Grapes are not gathered from thorn bushes nor figs from thistles, are they?
17 "So every good tree bears good fruit, but the bad tree bears bad fruit.
18 "A good tree cannot produce bad fruit, nor can a bad tree produce good fruit.
19 "Every tree that does not bear good fruit is cut down and thrown into the fire.
20 "So then, you will know them by their fruits.
21 "Not everyone who says to Me, 'Lord, Lord,' will enter the kingdom of heaven, but he who does the will of My Father who is in heaven will enter.
22 "Many will say to Me on that day, 'Lord, Lord, did we not prophesy in Your name, and in Your name cast out demons, and in Your name perform many miracles?'
23 "And then I will declare to them, 'I never knew you [that is the inner, personal, Love Relationship, that only comes when you receive HIM as LORD meaning MASTER] DEPART FROM ME, YOU WHO PRACTICE LAWLESSNESS.'
Both WAYS, are only filled with disciples of Jesus Christ, and unbelievers are not even in this picture.
One WAY leads to the Destruction of Hades/Hell.
The Other WAY leads to Eternal Life.
This absolutely should be read in CONTEXT, because the MANY in verse 22 refers to the MANY in verse 13.
THEY ALL ARE DISCIPLES, which only means FOLLOWERS, and does not MEAN that they are SAVED.
HOWEVER, only those who enter the small Gate onto the narrow WAY, are Born Again Christians.
AND NOTICE, only a FEW find that WAY.
John 3:3 (HCSB)
3 Jesus replied, “I assure you: Unless someone is born again, he cannot see the kingdom of God.”
John 3:6 (HCSB)
6 Whatever is born of the flesh is flesh, and whatever is born of the Spirit is spirit.