Who said “Every murderer is probably somebody's old friend.”?

“No man is useless while he has a friend.”

“And say my glory was I had such friends.”

“The ornament of a house is the friends who frequent it.”

“To find a friend one must close one eye -- to keep him, two.”

“Some people go to priests; others to poetry; I to my friends.”

“Crime is terribly revealing. Try and vary your methods as you will, your tastes, your habits, your attitude of mind, and your soul is revealed by your actions.”

“Curious things, habits. People themselves never knew they had them.”

“I married an archaeologist because the older I grow, the more he appreciates me.”

“One doesn't recognize the really important moments in one's life until it's too late.”

“I have learnt that I am me, that I can do the things that, as one might put it, me can do, but I cannot do the things that me would like to do.”

“There is nothing so dangerous for anyone who has something to hide as conversation! A human being, Hastings, cannot resist the opportunity to reveal himself and express his personality which conversation gives him. Every time he will give himself away.”