Here are some nice lines from recent novels I've read:
Of a woman, a longtime spy by profession, who survives a stabbing:
"She did not die on the doorstep. She had not died more times than she could count."
Closely observed nature:
"A few persistent weeds had sprung up in the cracks between the paving stones, but they'd withered to sepia wisps."
Self-explanatory, this one:
"Early morning is the best part of the day. . . . It's the only part of the day we haven't already mucked up with our fretting and strutting and carrying on."
A conversation between sisters, one of whom was cautious and one not:
"'You always put things at risk. If you fell out of a tree as a child, I'd clean you up and bandage your knees, and next I looked you'd be out climbing again. You never learned your lesson.' Oh, she'd learned her lesson: Climb harder."
Sources? All romance novels:
The Black Hawk, by Joanna Bourne
The Governess Affair, by Courtney Milan
The Bridegroom Wore Plaid, by Grace Burrowes
The Duchess War, by Courtney Milan