This may be an unconventional point of veiw. IMO, the "kingdom of heaven" is... God. Just like now He can be in you and outside of you simultaneously. Just as he is inside of time and his creation yet, at the same time outside of both. There, now it's all cleared up>
God is not contained in time, the universe, or His kingdom. Remember that a kingdom consists of four things:
a piece of real estate
a body of Law
Take any of the four away, and you arguably do not have a Kingdom.