“Again, the kingdom of heaven is like a net that was thrown into the sea and gathered fish of every kind. When it was full, men drew it ashore and sat down and sorted the good into containers but threw away the bad. So it will be at the close of the age. The angels will come out and separate the evil from the righteous and throw them into the fiery furnace. In that place there will be weeping and gnashing of teeth. “Have you understood all these things?” They said to him, “Yes.” Matt 13:47-51
“The mystery of the kingdom, again, is that as the net—the power of the kingdom—draws men into its sway, it draws good and bad. Only when the net is up on shore at the close of the age will the good and the bad fish be separated.
Notice carefully: the separation described here is not between the fish which didn’t get caught in the net of the kingdom and those which did. That’s not the point of this parable. The separation here is between two kinds of people who are swept into the net of the kingdom. One kind is kept. The other is cast into the fire.
So the mystery of the kingdom is not only that the kingdom is at first limited in its scope and its effect in the world (it’s a mustard seed), but also the mystery of the kingdom is that the people who come under the power of God’s kingdom are, as we say, a mixed bag. Some are true disciples. And some are hypocrites.
……………….beware of insisting that God demonstrate dimensions of the kingdom now which he has reserved for the consummation. The kingdom now is limited in its scope and effects. And beware of assuming that all who are swept into the power of God’s kingdom are the children of the kingdom. The power of the kingdom gathers many (Matthew 7:22) into its net that will be cast out in the end because they loved healing and not holiness; they loved power and not purity; they loved wonders and not the will of God.” – by John Piper, Is the Kingdom Present or Future?