Interesting. I thought it did not matter whether you were wicked or just, only whether you accepted Jesus Christ as your saviour?
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So shall it be at the end of the world: the angels shall come forth, and sever the wicked from among the just, And shall cast them into the furnace of fire: there shall be wailing and gnashing of teeth (Matthew 13:49-50).
On determining one's Christianity:
First: It is the individual that determines it.
Next: It is not the individual, it is the individual and Christ.
Next: It is only Christ that determines whether a person is Christian.
Now we have gnashing of teeth and it is the angels that determine the judgement.