To word, “Lord,” is an important word. It is an early confession of faith in Christ—“Jesus is Lord” (Rom. 10:9). But Jesus is not talking about oral faith. Rather, He is talking about obedient faith. In a parallel text in Luke 6:46, Jesus said, “Why do you call me ‘Lord, Lord,’ and not do what I tell you?” Jesus is not speaking about faith without obedience. Rather, He is speaking about faith with obedience.
That is the big problem of false prophets. They call Jesus, “Lord, Lord.” However, they disobey Him. They do not do the will of the Father in heaven.
What is the will of the Father in heaven? First, the will of the Father is the word of Jesus. (Davies/Allison) In Matthew, Jesus said, “the will of the Father.” In Luke, Jesus said, “what I tell you.” Thus, the will of the Father is what Jesus tells you.
Second, the will of the Father is the teaching of Jesus in the whole Sermon of the Mount. The will of the Father is to exceed the righteousness of the Pharisees. To exceed their righteousness is to live by the Law of the Lord as interpreted by Jesus. It is praying, fasting, and giving to the poor in secret. It is to seek first His kingdom and His righteousness. It is to walk on the hard road of suffering for Christ. It is to live with no temporal reward in the present, but expecting eternal rewards in the future. That is the will of the Father.
Third, the will of the Father is that you turn from sin. In Matt. 21:28-32, Jesus tells a parable of two sons.
28 “What do you think? A man had two sons. And he went to the first and said, ‘Son, go and work in the vineyard today.’ 29 And he answered, ‘I will not,’ but afterward he changed his mind and went. 30 And he went to the other son and said the same. And he answered, ‘I go, sir,’ but did not go. 31 Which of the two did the will of his father?” They said, “The first.” Jesus said to them, “Truly, I say to you, the tax collectors and the prostitutes go into the kingdom of God before you. 32 For John came to you in the way of righteousness, and you did not believe him, but the tax collectors and the prostitutes believed him. And even when you saw it, you did not afterward change your minds and believe him.”
The will of the Father is to repent your sin and obey God. To obey God is to obey Christ. The will of the Father is to believe in Christ and to obey Christ.
However, the false prophets do not do the will of the Father. Thus, they will not enter the kingdom of heaven. They may say the same password, “Lord, Lord.” But it will not gain them access into the kingdom.
To enter the kingdom is to be saved on the last day. The false prophets will not enter the kingdom. They will not be saved on the last day. To enter the kingdom is to inherit the kingdom (Matt. 25:34). The false prophets will not inherit the kingdom.
Note the future tense of the verb, “will enter.” The kingdom is here now, spiritually, in the hearts of believers. But the kingdom is yet to come. It is the future millennial kingdom of Christ when He comes. The false prophets will not enter that kingdom.