In the modern era, Janus is also used as a metaphor for the often complex nature of humanity. Janus is often referenced in art with two-faced individuals who have markedly different faces, such as the face of a man and the face of a woman. The Romans probably did not think about Janus in this way, although they undoubtedly thought about duality and betrayal, just as modern people do.
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A (wise) man of two faces 
In the modern era, Janus is also used as a metaphor for the often complex nature of humanity. Janus is often referenced in art with two-faced individuals who have markedly different faces, such as the face of a man and the face of a woman. The Romans probably did not think about Janus in this way, although they undoubtedly thought about duality and betrayal, just as modern people do.