Reveal not every secret you have to a friend, for how can you tell but that friend may hereafter become an enemy. And bring not all mischief you are able to upon an enemy, for he may one day become your friend.
I used to think that the brain was the most wonderful organ in my body. Then I realized who was telling me this.
A little government and a little luck are necessary in life, but only a fool trusts either of them.
Ask not what you can do for your country. Ask what's for lunch.
We make a living by what we get, we make a life by what we give.
Hearing voices no one else can hear isn't a good sign, even in the wizarding world.
The ornament of a house is the friends who frequent it.