Phlox

"Crewmen Bennett and Hayden over there, do you see them? If I'm not mistaken, they are preparing to mate. Do you think they might let me watch?" - Phlox to Tucker

"There's an old saying: 'When in Fellebia, do as the Fellebians do.'" - Phlox to T'Pol

"I'm not sure if congratulations are in order, Commander, but you're pregnant!" - Phlox to Tucker

Reed : "It can't be ethical to cause a patient this much pain."
Phlox : "It's unethical to harm a patient, I can inflict as much pain as I like."

People :

Malcolm Reed, Phlox

"You suggest I read the manual!?" - Phlox to T'Pol; regarding starting the warp drive up

"I'm a physician, not an engineer!" - Phlox to T'Pol; and Enterprise makes it's first contribution to the 'and Enterprise makes it's first contribution to the 'I'm a Doctor, not a...' list!'

"As far as I know there are no species in the galaxy that have mastered the art of mixing romance and vocation... This is the one ailment that is universally untreatable, you'll have to suffer through it." - Phlox to Tucker

"Will you kindly die?" - Mirror Phlox to the Tholian

"I skimmed a few of the more celebrated narratives. The stories were similar in some respects but their characters were weak and compassionate. With the exception of Shakespeare, of course. From what I could tell his plays were equally grim in both universes." - Mirror Phlox to Mirror Phlox; on the differences in literature between the two universes

"When you invited me to join this crew, I thought it would be an interesting diversion for a few months. Some time away from the complications of family, which on Denobula can be extremely complicated. I didn't expect to gain another family. It hurts as if she were my own child. Make something good come from this, Captain." - Phlox to Archer; on Elizabeth's death