"[Love] is a trade and a deal that manifests in many forms; but comes down to sacrifice and compromise."
YOUMU: I thought about what you said.
YOUMU: And I think you have a point.
DIOTIMA: What point would that be?
YOUMU: That love must be negative overall.
And like I said, the problem isn't that the idea doesn't work, it just doesn't show up. The flashback says...
GAINED “LOVE IS, DESPITE SUFFERING, ULTIMATELY GOOD.”
...but the first two times I tried, the idea did not actually show up in my idea list. It did when I replayed to get the exact text, and I wish I'd paid attention to the exact order of events each time.
Two last notes:
1. How do you spoiler stuff on itch? I feel like some of this should be spoilered.
2. Should I be disappointed that you didn't include a single "baby don't hurt me" in this game about "what is love?", or impressed by your restraint?