My favorite quote that exemplifies AOII for me was actually one that was printed up and given out at one of the first meetings I went to as a pledge:
“The bond that links your true family is not one of blood, but of respect and joy in each other's life. Rarely do members of one family grow up under the same roof.”
Also, a cute one I like for bid day shirts is:
"Girls don't come to college to find husbands, they come to find their bridesmaids!"
I always wished I'd had a shirt with that on it!
Alpha Love,
Kristi