The motive was quickly recognisable: the forger used key words taken from the authentic Gospel and then inserted them into the New Testament with a different meaning - usually in fantasy stories - in pursuit of a specific aim and objective.
Symbolism was transformed into real-life scenarios and vice versa. In this way, the forger was able to proclaim the opposite with the same words, while still being consistent with the Old Testament.
The simple negation of a sentence was a common way of falsifying. But even by swapping a tiny word, such as a preposition, the meaning of a sentence could be completely different.