Lines that "have" to be in "Ender's Game" the movie--Spoilers

Ok, assuming the movie ever gets off the ground, what lines and quotes from Orson Scott Card’s book have to be in the movie?
Paraphrased “Sometimes a lie is better than the truth” from the first page.

The entire “Ive seen him through his eyes” exchange.

and of course

“The enemies gate is down”.
What are some other lines that have to be in the Movie.

Make that last . a ? ok ?