OBEY, BEHAVE and REPRODUCE.
http://simple.wikipedia.org/wiki/List_of_U.S._state_mottos
i am not sure of all of the places to get them but if you go to www.zazzle.com and search twilight or any of the sayings, you will get many items with twilight sayings.
Out of all the other fish in the sea, will you go to sadies with me?
One was Ahua Una
it is still used today because it helps people lives, to keep everything calm. most people use his sayings but not all
Most of the sayings are in the book not the movie, but the ones I can remember are: The lion fell in love with the lamb (sorry that's all I got, someone please update it)
Sayings can originate pretty much anywhere.
ready for one job
Some sayings are old and some are dated. But most/all the sayings indicate the 'always true' actions. We can't say whether it is a past or future or present.
The answer is far beyond the scope and the time anyone could spend answering your question
In the spell books
There isn't a song with the title "Cute Sayings". However, there are many songs that have cute sayings. For example, "You are precious and I love you".