Lighten up, come to grips with the idea - Tradução em português

Olá,

Consta no meu dicionário que "to come to grips with" é desentender-se. Mas como fica a parte em negrito?

Several readers were outraged by Prudie. Here is Sean Blythe, of Los Angeles: " How petty and mean-spirited does one have to be to refuse to move two feet to allow a couple to sit together at the movies? I mean, what's the rationale? Sound and picture quality? It's a movie theater, kids, not the freaking promised land. Lighten up, come to grips with the idea that you're not the only people in the world, and move the hell over.

Obrigado desde já.

Márcio Alexandre