"A philosopher is a thoughtful middle-aged person who puts off enjoying life until it's too late to begin." "I hate middle-aged people," said Peter.
"I am not very fond of them myself, as a rule," said Sarah, indulgently.

"They aren't nice and amusing to talk to, like you and me; or rather" (with a glance at her companion's face), "like _me_; and they aren't picturesque and fond of spoiling us, as _really_ old people are.

They are just busy trying to get all they can out of the world, that's all.

But there are exceptions; or, of course, it wouldn't be a rule.

Your mother is an exception.