What exactly does it mean?

Mat 16:19 KJV - And I will give unto thee the keys of the kingdom of heaven: and whatsoever thou shalt bind on earth shall be bound in heaven: and whatsoever thou shalt loose on earth shall be loosed in heaven. | Mat 18:1 KJV - At the same time came the disciples unto Jesus, saying, Who is the greatest in the kingdom of heaven? | Mat 18:3 KJV - And said, Verily I say unto you, Except ye be converted, and become as little children, ye shall not enter into the kingdom of heaven. | Mat 18:4 KJV - Whosoever therefore shall humble himself as this little child, the same is greatest in the kingdom of heaven. | Mat 18:23 KJV - Therefore is the kingdom of heaven likened unto a certain king, which would take account of his servants... | Jesus spoke many parables regarding the kingdom of heaven, to confound the wise (know it alls), and Jewish religious leaders. In private he expounded them to his disciples. Next we shall explore the kingdom of God... | Luk 13:18 KJV - Then said he, Unto what is the kingdom of God like? and whereunto shall I resemble it? | Luk 13:20 KJV - And again he said, Whereunto shall I liken the kingdom of God? | Luk 13:28 KJV - There shall be weeping and gnashing of teeth, when ye shall see Abraham, and Isaac, and Jacob, and all the prophets, in the kingdom of God, and you [yourselves] thrust out. | Luk 13:29 KJV - And they shall come from the east, and [from] the west, and from the north, and [from] the south, and shall sit down in the kingdom of God. | Luk 14:15 KJV - And when one of them that sat at meat with him heard these things, he said unto him, Blessed [is] he that shall eat bread in the kingdom of God. | Luk 16:16 KJV - The law and the prophets [were] until John: since that time the kingdom of God is preached, and every man presseth into it. | Luk 17:20 KJV - And when he was demanded of the Pharisees, when the kingdom of God should come, he answered them and said, The kingdom of God cometh not with observation: | Luk 17:21 KJV - Neither shall they say, Lo here! or, lo there! for, behold, the kingdom of God is within you. | Luk 18:16 KJV - But Jesus called them [unto him], and said, Suffer little children to come unto me, and forbid them not: for of such is the kingdom of God. | Luk 18:17 KJV - Verily I say unto you, Whosoever shall not receive the kingdom of God as a little child shall in no wise enter therein. | Luk 18:24 KJV - And when Jesus saw that he was very sorrowful, he said, How hardly shall they that have riches enter into the kingdom of God! | Luk 18:25 KJV - For it is easier for a camel to go through a needle's eye, than for a rich man to enter into the kingdom of God. | As it appears, the 2 stated kingdoms are the same exact thing, just the different writers expression of it? | Dan 2:44 KJV - And in the days of these kings shall the God of heaven set up a kingdom, which shall never be destroyed: and the kingdom shall not be left to other people, [but] it shall break in pieces and consume all these kingdoms, and it shall stand for ever. | This verse from Daniel makes it very clear, regarding what Jesus spoke. And that this very kingdom is nothing more or less than simple Christianity, which was indeed established in the days of said kings (Pentecost). Invisible but very present growing kingdom (many souls throughout history, and more joining each day). As with mans kingdom (material), God has his kingdom (spiritual). The full presence of Gods kingdom will be revealed at Christ's 2nd coming (in stages; rescue, vengeance; wrath). When Gods mighty kingdom shall bloom unabated on earth for a given time period (millennium?), absent of Satan's power, until the big 'holy' battle (God vs. Satan - Armageddon), followed by a new heaven and earth (new universe?). Anyway, we have but a vague figurative glimpse of that future scenario, as that is all the bible reveals to us. The full vision comes later, in the reality sequence. Today is the apocalyptic unknown; beast, babylon, etc.