"If I take a little courage"
Many people like this phrase.
Especially for teenager content, this phrase is frequently used.
I who am complaining about anime, am disqualified as an "adult".
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There is certainly a case where something changes if you give it a little courage.
However, that is a rare case.
Even if you give a little courage, there are usually cases where nothing changes,
There are many cases where things get worse with a little courage.
This is because the situation where “courage” is necessary leads to an uncertain future that cannot be predicted after courage.
If you want to make things better, it is the right way to think over 100 measures that do not require courage and to change little by little while predicting over 1000 futures --- I think.
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Anyway,
With "a little courage", the world is unlikely to move.
Only the “courage to destroy all the world (including myself)” moves the world.
However,
"If I take the courage to destroy the world"
I think that it would be ruined if I let the heroine say the phrase.