Mystra was Gale's muse, not the other way around. And the "just be content" is easier said than done, if you have literally nothing else in your life but that one passion / your job and have a feeling that you just aren't good enough. (Very relatable.) They all are shaped by the environments in which they grew up or lived in and Astarion and Gale are especially messed up by this. In a way it's poetic. The guy who's ambition brought him all kinds of misery can use the burden this ambition placed on him to destroy all the instruments of human/illithid ambition (brain and crown) in one swoop, or he can redirect his ambitions and live a fuller life in which he uses his gift to help those around him. (Or he become a god, but I am not too fond of that ending.) Either way, Gale of Waterdeep dies that day.
But I am cluttering Karlach's thread with how much I like Gale. ^^
