Trailblazer said: ...Where in the Bible is there an actual Plan for building the Kingdom of God on earth?
....
I think it is in these:
Jesus answered, "My kingdom is not of this world. If my kingdom were of this world, then my servants would fight, that I wouldn't be delivered to the Jews. But now my kingdom is not from here."
John 18:36
"The Kingdom of God doesn't come with observation; neither will they say, 'Look, here!' or, 'Look, there!' for behold, the Kingdom of God is within you."
Luke 17:20-21
Jesus answered him, "Most assuredly, I tell you, unless one is born anew, he can't see the Kingdom of God." Nicodemus said to him, "How can a man be born when he is old? Can he enter a second time into his mother's womb, and be born?" Jesus answered, "Most assuredly I tell you, unless one is born of water and spirit, he can't enter into the Kingdom of God! That which is born of the flesh is flesh. That which is born of the Spirit is spirit. Don't marvel that I said to you, 'You must be born anew.'
John 3:3-7
It is the spirit who gives life. The flesh profits nothing. The words that I speak to you are spirit, and are life.
John 6:63
Once, Jesus sent his disciples to preach the Kingdom of God. He sent them forth to preach the Kingdom of God, and to heal the sick.
Luke 9:2
"Therefore don't be anxious, saying, 'What will we eat?', 'What will we drink?' or, 'With what will we be clothed?' For the Gentiles seek after all these things, for your heavenly Father knows that you need all these things. But seek first God's Kingdom, and his righteousness; and all these things will be given to you as well.
Matthew 6:31-33
But the whole Bible is important part in understanding and being born anew, because it can cause the change in persons heart that was foretold in OT.
Yahweh your God will circumcise your heart, and the heart of your seed, to love Yahweh your God with all your heart, and with all your soul, that you may live. Yahweh your God will put all these curses on your enemies, and on those who hate you, who persecuted you. You shall return and obey the voice of Yahweh, and do all his commandments which I command you this day. Yahweh your God will make you plenteous in all the work of your hand, in the fruit of your body, and in the fruit of your cattle, and in the fruit of your ground, for good: for Yahweh will again rejoice over you for good, as he rejoiced over your fathers;
Deuteronomy 30:6-9
For finding fault with them, he said, "Behold, the days come," says the Lord, "That I will make a new covenant with the house of Israel and with the house of Judah; Not according to the covenant that I made with their fathers, In the day that I took them by the hand to lead them out of the land of Egypt; For they didn't continue in my covenant, And I disregarded them," says the Lord. "For this is the covenant that I will make with the house of Israel. After those days," says the Lord; "I will put my laws into their mind, I will also write them on their heart. I will be to them a God, And they will be to me a people. They will not teach every man his fellow citizen, Every man his brother, saying, 'Know the Lord,' For all will know me, From the least of them to the greatest of them. For I will be merciful to their unrighteousness. I will remember their sins and lawless deeds no more."
Hebrews 8:8-12 (Jeremiah 31:31-34)