Here's a great idea. I want one of these in a shop near me so I can go get little pieces of inspiration randomly.
Calligraphers rely on Quotes quite a bit for their content. In a work shop with Mike Gold a couple years back, with the above mentioned Pendragons, we worked with "Jabberwocky" from Alice Through the Looking Glass for our text. The letter artist can focus on creating the letter forms and not think about the words.
I have word documents on my computer where I am constantly pasting new quotes & poetry. I also have a folder of printed copies to take to work shops.
In another class with Annie Cicale we used Roman Capitals to play with spacing, running words together,changes in size and weight of letters.
It all comes down to the joy of sitting down and creating. Words, quotes, poetry all offer good pieces of text to appreciate, play with, and get inspired by.