"Not everyone who says to me, 'Lord, Lord,' will enter the kingdom of heaven, but only the one who does the will of my Father in heaven.
"Everyone who listens to these words of mine and acts on them will be like a wise man who built his house on rock. The rain fell, the floods came, and the winds blew and buffeted the house. But it did not collapse; it had been set solidly on rock. And everyone who listens to these words of mine but does not act on them will be like a fool who built his house on sand. The rain fell, the floods came, and the winds blew and buffeted the house. And it collapsed and was completely ruined." (Mt 7:21,24-27)
Kingdom of heaven is where everyone wants to be. All want to enter into kingdom of heaven. The Jews believed that that had Abraham as their father and hence they believed that they would have entry into the kingdom. There were others who believed in God and their appeal to God (who call God as Lord, Lord) would grand them an entry.
Father in heaven is in the kingdom of heaven. In this kingdom what is important, is doing the will of the Father. God has a plan for everyone. (we see this very much in the lives of the prophets and kings and others). His plan is to build the kingdom among the people and creation. Building the kingdom is by executing the plan of God (will of the Father).
Will of God is revealed in the words of Jesus. Listening to the words of Jesus and acting accordingly is doing the will of God. These are the wise men who are like the building founded on rock. Listening to Jesus and doing the words of Jesus is doing the will of the Father and thus enter into the kingdom of Heaven.
