I choose my friends for their good looks, my acquaintances for their good characters, and my enemies for their good intellects.

A man cannot be too careful in the choice of his enemies.
I have not got one who is a fool.

They are all men of some intellectual power, and consequently they all appreciate me.

Is that very vain of me?
I think it is rather vain." "I should think it was, Harry.

But according to your category I must be merely an acquaintance." "My dear old Basil, you are much more than an acquaintance." "And much less than a friend.