How do we know the doctrine of the whole and part is true?

The doctrine of synecdoche is substantiated through various scriptures where parts are representative of the whole. For example, when 'blood' is mentioned, it signifies the life of a person (Leviticus 17:11), indicating a complete understanding of humanity beyond physical existence. This literary device is not merely rhetorical but serves as a foundational principle in understanding how God communicates complex spiritual truths through simple language. The consistent biblical use of synecdoche affirms its truth and relevance in theological discourse.