It's what's in *yourself* that makes you happy or unhappy.

Time is the best killer.

There's too much tendency to attribute to God the evils that man does of his own free will.

Never do anything yourself that others can do for you.

Poirot said placidly, “One does not, you know, employ merely the muscles. I do not need to bend and measure the footprints and pick up the cigarette ends and examine the bent blades of grass. It is enough for me to sit back in my chair and think. It is this – ” he tapped his egg-shaped head – “this, that functions!

Three months seems to me quite a reasonable time to complete a book, if one can get right down to it.

Who is there who has not felt a sudden startled pang at reliving an old experience or feeling an old emotion?