To me the most powerful How to be Patient Quote is this:
The Art of Being Patient is Doing Something Else in The Meantime
It works for me every time especially at mealtimes when the kids take ages to eat. Instead of yelling at them, I would leave my seat after I have finished eating, sit myself promptly at the piano and start playing.
I get to practice piano, the house is filled with beautiful piano music, there is no yelling and no impatience.
Try this patience quote. It really works.... especially if you have to wait around impatiently for young kids!