Step 1: Understand the term "Aphorism''
An "aphorism'' is a pithy or concise statement that expresses a general truth or principle, often in a witty or wise manner.
Step 2: Evaluate other options
- "Paradox'': A statement that contradicts itself but might be true.
- "Metaphor'': A figure of speech comparing two things without using "like'' or "as''.
- "Simile'': A comparison using "like'' or "as''.
Only "Aphorism'' fits the definition of a brief truth-expressing statement.