You light him up in his eyes, I've seen it.
6 seconds sound clip from the Sling Blade (1996) movie soundboard.
You can hear this line at 02:01:53 in the Blu-ray version of the movie.
Quote context
[...]
- He just wanted to go off and play, I reckon.
- You just go in there and eat your dinner with that Doyle. Don't worry yourself none.
- All right, then. Well, I'll see you later.
- Ma'am?
- Yeah. You're a good momma to that boy. You care for him. You work hard to care for him.
- You light him up in his eyes, I've seen it.
- That boy wouldn't know what to do without you.
- Well, thank you, hon. That's real good of you to say.
- I wouldn't know what to do without him either.
- You and that boy has given me a good feeling.
[...]