Things never come when they are expected.

Then there are some minor points that strike me as suggestive - for instance, the position of Mrs. Hubbard's sponge bag, the name of Mrs. Armstrong's mother, the detective methods of Mr. Hardman, the suggestion of Mr. MacQueen that Ratchett himself destroyed the charred note we found, Princess Dragomiroff's Christian name, and a grease spot on a Hungarian passport.

You are the patient one, Mademoiselle,' said Poirot to Miss Debenham. She shrugged her shoulders slightly. 'What else can one do?' You are a philosopher, Mademoiselle.' That implies a detached attitude. I think my attitude is more selfish. I have learned to save myself useless emotion.

I'm sure you have a theme: the theme of your life. You can embellish it or desecrate it, but it's your theme, and as long as you follow it, you will experience harmony and peace of mind.

... obsessions are always dangerous.

Imagination is a good servant, and a bad master.

Any coincidencce is worth noticing. You can throw it away later if it is only a coincidence.