This article aims to compare some selected aspects of Peirce's semiotic with two other distinct but basic viewpoints on metaphor, which are inherently semiotic but not strictly in a Peircean way: Aristotle's analysis of metaphor as perhaps the most important figure of (persuasive and creative) speech in his Poetic and Rhetoric and Nietzsche's accent on the rhetorical/metaphorical and semiotic "non-essential nature" of language and his notion of strictly semiotic structure of thought (in his early Lectures on Rhetoric).