Wisdom can be found in commonplace opinions about books or movies, which can give a new slant to the terms "jealousy", "gluttony" or "joy". Ask someone you know, and whose opinions you think you have a handle on, what they think joy is, and you might have material for a new novel.
I am in the middle of writing my next novel. It would be practically impossible to do it without drawing on the depth of experience, the advice, the anecdotes, the opinions and the wisdom I have observed in people around me, strangers I meet, and acquaintances I make online.
One might think it would be impossible to produce anything at all without the input of a number of people: all works are the product of a team of some sort. Inspiration is nothing short of the wisdom we gain from others.