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'Infinite voltage' is the term used by the author in your highlighted text. We don't have infinite voltage yet the author conveys something about the invincibility of inductors. Perhaps you've heard that advanced technology looks like magic to the uninitiated. Our world uses inductors to perform magic every day. Let's reverse the scenario of voltage and current. Aprupt stoppage of current in an inductor can generate voltage that soars and is liable to get out of hand if we're not careful.

* Example... I neglected to add a load to my experimental boost converter. In half a second of operation I watched output voltage climb to a level that would have blown up the output capacitor. I had to act quickly to cut power.

* Example... a lineman used an ordinary VOM to take an ohm reading of a huge transformer or inductor. After sending 1.5V through windings he pulled away the probes. Stopping the few milliAmps caused an immediate voltage surge which jumped as an arc and electrocuted the lineman.