the one i use on the end of each of my e-mails is :

Peace will reign when the power of love

is stronger than the love of power.

i have been informed that this is a chiastic phrase. Which is this:
In each example, if you connect the similar words with a straight line, you form an "X", which is the Greek letter "chi". If you search for chiasmus, you will find entire websites devoted to this subject.
(such as ask not what your country can do for you
but what you can do for your country)
A few years ago I put this on my chrtistmas card:
'I'll see it when i believe it "

life is what happens when you are making plans

It is like trying to herd banana slugs (or cats)

we used to have a dog....when asked what her breed was
we answered "Canardly" because you can hardly tell what....