In My End Is My Beginning -

I've Got A Stomach Now As Well As A Behind. And I Mean - Well, You Can't Pull It In Both Ways, Can You? ... I've Made It A Rule To Pull In My Stomach And Let My Behind Look After Itself.

If You Ask Me, Nobody Really Likes People Who Are Always Doing Their Duty.

... Nothing Is So Boring As Devotion.

There's No Agony Like [getting Started]. You Sit In A Room, Biting Pencils, Looking At A Typewriter, Walking About, Or Casting Yourself Down On A Sofa, Feeling You Want To Cry Your Head Off.

In Conversation, Points Arise! If A Human Being Converses Much, It Is Impossible For Him To Avoid The Truth! (hercule Poirot)