So I was watching a TV show called Hannibal. I was on the last episode of season three, called "The Wrath of the Lamb".
So Will Graham (a character from the show) was having a talk with psychiatrist Bedelia Du Maurier (another character).
Bedelia Du Maurier: "We assign a moment to decision. What you propose is so thoughtless, I find difficult to imagine that moment exists."
Will Graham: "Decisions are made of kneaded feelings. They are more often a lump than a sum."
I can't really understand Will Graham's statement. I understand the part "Decisions are made of kneaded feelings" but I can't understand the other part. What is meant by "lump than a sum"?
Is it some kind of idiom? I have searched, but I couldn't find it.