I think this is substantiated, we absolutely desire our needs. I can't think of one single desire that does not demand satisfaction. Perhaps I am not understanding something.
In the case that Lewis is alluding to (an unsatisfied yearning for spiritual fulfillment), the argument is tautological. If God is real in the way he imagines it, the presence of this spiritual yearning is a kind of evidence. If God is not real in the way he imagines, the presence of this spiritual yearning is evidence that the assertion is false.
The context is that CS Lewis was a devout christian and evangelist, and is referring to spiritual desire.
I read "The Great Divorce", and interpreted it as metaphorical, in the "kingdom of heaven on earth" way. How honest work, faith, and openness are uplifting, vs getting trapped in psychological prisons.
But this quote refers to a literal afterlife. I don't know what to make of that.
I need food so I desire food and I eat to satisfy it.
I desire to have perfect love and relationships, but can’t seem to achieve it.
But if I cannot find a perfect slice of pizza, g-d exists and another world follows this one where the pizza is truly satisfying?
Believe whatever you like, but realize Faith is required for this to follow that. Logic won’t do it for you alone.