From Act Three of the first play in the trilogy (Homecoming), this
MANNON--(avoiding her glance--insistently) Shut your eyes again. Listen and you'll know. (She shuts her eyes. He plods on with a note of desperation in his voice.) I thought about my life--lying awake nights--and about your life.
You'll find I have changed, Christine. I'm sick of death! I want life! Maybe you could love me now! (in a note of final desperate pleading) I've got to make you love me!
Full text of monologue available at: O’Neill, Eugene. Mourning Becomes Electra: Homecoming. 1931. http://gutenberg.net.au/ebooks04/0400141h.html#p02