Here's why:
* Proper Noun: "Sojourner Truth" refers to a specific person, a historical figure. Proper nouns are always capitalized.
* Common Noun: Common nouns are general names for people, places, things, or ideas. They are not capitalized unless they start a sentence.
Here's how you could use a common noun to describe Sojourner Truth:
* Abolitionist: "The abolitionist spoke passionately about the injustices of slavery."
* Suffragist: "The suffragist campaigned for women's right to vote."
* Activist: "The activist dedicated her life to fighting for equality."
You can also use a more descriptive phrase:
* "A woman who fought for the rights of all people."
* "A powerful voice against oppression."
* "A symbol of courage and resilience."
Remember, it's important to respect historical figures and use their names accurately.