Trust
Jennifer trusts that Ridgeon placing Louis into Bonington's care is best for his chances of survival. Ironically, Ridgeon does so in order that Louis won't survive and he will then marry Jennifer.
No Patients!
Ridgeon won't allow Emmy to send up a woman who's come in regards to her husband. He says he has no time for her nor her husband. Ironically, when he meets her and sees that she is beautiful he is more than willing to spend time with her and see how he can help.
Honor
Ridgeon says that the most tragic thing in the world is genius without honor. He says this to describe Louis. Ironically, Ridgeon is a genius himself as he has developed a cure for tuberculosis, yet he acts without honor by allowing Louis to die in the care of Bonington instead of treating the young artist himself.
Marriage
Ridgeon believes that Jennifer will marry him once Louis is dead. Ironically, she does remarry, but to another man. And, she finds the idea of marrying Ridgeon absurd as he is far too old for her.
Treatment
Bonington accepts the charge to treat Louis and before Jennifer can speak he asks her to think nothing of it, that it is his pleasure. Ironically, she doesn't want to thank him, she wants him to not be the one to treat her husband. She wants Ridgeon to be the physician to be the one that sees to his cure.
