Four Levels of Understanding of a Concept;
Pick any concept you can think of and find its polar opposite.
I will pick happiness and sadness.
Level 1: We should be happy.
Level 2: We should not be sad.
Level 3: We cannot be happy without being sad.
Level 4: We cannot be sad without being happy.
A Fundamental Core of Looking at the Paradox
Core: We understand this is paradoxical and all definitions are by nature circular.
At this very instant, I feel nostalgic about watching the movie Inside Out when I was younger.