“I said, names aren't important," he repeated. There was a silence between them for some seconds, then the Ranger said: "Do you know what is important?"
Will shook his head.
"Supper is important!”

“Of what must be said and what must not be said. The importance of knowing.”

“Once, Picasso was asked what his paintings meant. He said, “Do you ever know what the birds are singing? You don’t. But you listen to them anyway.” So, sometimes with art, it is important
just to look.”

“Do you want to know why men name their penis? So the most important decisions in their life aren't made by a stranger.”

““Well, what are you doing? What have you done?”
“I am sitting in this char,” said Poirot. “Thinking,” he added.
“Is that all?” said Mrs. Oliver.
“It is the important thing,” said Poirot.”

“The Principle of Priority states (a) you must know the difference between what is urgent and what is important, and (b) you must do what’s important first.”

“Lord Peter Wimsey: Wait a second… I'm not sure that you haven't said something useful and important.
Lady Mary Wimsey: Everything I say is useful and important.”

“I remember a very important lesson that my father gave me when I was twelve or thirteen. He said, "You know, today I welded a perfect seam and I signed my name to it." And I said, "But, Daddy, no one's going to see it!" And he said, "Yeah, but I know it's there."”

“What is important is not what you hear said, it's what you observe.”

“I asked him, “Do you know the difference between nude and naked?”
He shook his head.
“Nude is artistic. Naked is defenseless.””