So how do spells really work?
The book Silence, and the function of that spell, imply that you need a verbal component for spells to function. Morrowind and the older games had a motion required to cast a spell, implying that the somatic is required. Morrowind even had casting times. But then you have Skyrim, which has casting times and motions for only a few. And you never hear anyone saying anything when casting spells.
So how do you cast spells, really?