Алисия
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Herald, as always, you touch upon the most interesting philosophical topics, which one can discuss endlessly!
Regarding the topic:
The meaning of each person's existence in general is to break free from the chain of endless reincarnations. And the meaning of a specific life is to bring oneself closer to what is highlighted above in red through self-development and one's actions.
In general, this question, like the question of God, has different interpretations, as does any philosophical question.