I've come across two interesting quotes in my reading of Agatha Christie recently. One made me giggle:

[Mrs Luxmore, a romantic widow] "How right you are. Yes, a woman knows. But I never showed him that I knew. We were Major Despard and Mrs. Luxmore to each other right up to the end. We were both determined to play the game." She was silent, lost in admiration of that noble attitude.
     "True," murmured Poirot. "One must play the cricket. As one of your poets so finely says, 'I could not love thee, dear, so much, Loved I not cricket more.'"
     "Honour," corrected Mrs. Luxmore with a slight frown.
     "Of course—of course—honour. 'Loved I not honour more.'"

So I looked up that quote:

To Lucasta, going to the Wars
Richard Lovelace. 1618–1658

Tell me not, Sweet, I am unkind,
  That from the nunnery
Of thy chaste breast and quiet mind
  To war and arms I fly.

True, a new mistress now I chase,
  The first foe in the field;
And with a stronger faith embrace
  A sword, a horse, a shield.

Yet this inconstancy is such
  As thou too shalt adore;
I could not love thee, Dear, so much,
  Loved I not Honour more.

How quaint. And what a completely foreign concept is this honour.

The other quote is from a Tommy and Tuppence book, and they quote a woman called Nurse Edith Cavell, who was executed by firing squad for smuggling hundreds of soldiers out of Germany in WW1, and said something like "Patriotism is not enough. I must have no hatred in my heart." Kind of like a more noble and tragic Nancy Wake. Edith and Nancy are two of my favourite girl names. I don't really understand the quote but I'm pleased I looked it up and discovered such a brave woman.