Parable of the Net

We continue learning about The Kingdom of Heaven, and this time we learn that it is like The Parable about a Fishing Net.
As with other parables, the language in this parable is clear, concise and strong. 
It's a parable found only in Matthew and returns to a similar theme of the parables of the treasure and the pearl, where you sell all - you do what it takes - to gain the kingdom.  
On the day of judgement, when the true membership of God's kingdom is finally settled, the good will be separated from the bad. It is not for anyone to determine who are "the real Christians" - that task belongs to God. It's our task to be prepared.