[SOLVED] Resistor or capacitor voltage gain

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Hi everyone

I'm reading the second chapter (Transidtors) in the Art of Electronics and I found a sentence that I couldn't make sense of.

Note that voltage amplification isn't what matters, since, for example, a step-up transformer, a "passive" component just like a resistor or capacitor, has voltage gain but no power gain.
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How could a resistor or a capacitor have voltage gain?
Thanks in advance
 

It says that a transformer is a passive component that has voltage gain. A resistor or capacitor are also passive components. Passive components never have power gain.
 
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