Jesus told this parable: "The kingdom of Heaven is like a net that was let down into the lake and caught all kinds of fish. When it was full, the fishermen pulled it up on the shore. Then they sat down and collected the good fish in baskets, but threw the bad away." (Mat 13:47–48).
Jesus explained this parable: This is how it will be at the end of the age. The angels will come and separate the wicked from the righteous and throw them into the blazing furnace, where there will be weeping and gnashing of teeth. (Mat 13:49–50).
seven-years Tribulation period, see The Book of Revelation. Several people will become Christian believers even during this time, and several of the believers will become martyrs for their Christian faith. The parable describes the separation of
the people that occurs at The Rapture, and when Jesus returns at the end of the Tribulation period, see The Sheep and the Goats and Messiah's Second Coming
in The Prophecies of Isaiah.
The gnashing of teeth is a biblical reference to the hatred and loathing of people who realize they are trapped and can't get out. They have refused to repent and have not turned to God.
See also The Parable of the Weeds.
But there is still time for all who are still alive because Jesus has not yet returned. We should therefore not stop praying for them.
For information on other parables, see Jesus' Parables.
