Accidental Hero: During the climax, Jake grabs a phaser rifle and starts firing blindly at the Klingons out of sheer panic. It turns out he caused a cave-in that gave the hospital enough time to get everyone out, and he's hailed as a hero.
As the Good Book Says: The title of the episode is an abbreviated quote from Ecclesiastes, Chapter 9, Verse 11.
I returned, and saw under the sun, that the race is not to the swift, nor the battle to the strong, neither yet bread to the wise, nor yet riches to the intelligent, nor yet favor to men of knowledge; but time and chance happeneth to them all
Be Careful What You Wish For: While on the Runabout Jake laments how boring the medical conference he was supposed to be writing about was, and wishes for something more exciting. He certainly gets it.
Captain's Log: Jake gets his own version as he's a journalist writing down what he witnesses.
Died Standing Up: Well, sitting up. Burke was determined to see the sky when he died.
Dirty Coward: One of the wounded confesses that he shot himself in the foot with his own phaser to get out of combat.
Jake sees himself as this partway through the storyline. Eventually he comes to realize that the line between courage and cowardice is far thinner than he ever realized.
This Is Reality: Burke calls out Jake's wish for redemption, noting that in real life that sort of thing doesn't happen the way it does in books.
War Is Hell: Jake goes into the episode eager to see what the front-lines are like and look for new writing material. Then he gets to experience all the pointless violence, bloodshed and psychological scarring.