If life happens only once, it has no weight. Decisions don't matter because there is no "Eternal Return." This leads to freedom, but also a profound lack of meaning.
Tomas's wife. She represents "Weight." She views sex and love as inseparable and suffers from Tomas’s infidelities. The Unbearable Lightness of Being
The crushing of that freedom, which forces the characters to choose between exile, collaboration, or quiet resistance. If you want to dive deeper, I can focus on a specific area: The philosophy of Nietzsche and the "Eternal Return" If life happens only once, it has no weight
Tomas’s mistress and an artist. She is the ultimate avatar of Lightness, constantly betraying her past to remain "free." She represents "Weight
Not just pity, but the "co-sentiment" of feeling another's suffering. This is the "weight" that binds Tomas to Tereza.
A successful surgeon and womanizer. He embodies "Lightness" but is constantly pulled toward "Weight" by his love for Tereza.