I honestly didn't have a favorite self-care quote. I have lots of favorite quotes, but they all focus on self-improvement and world-view. I did a quick Google search for "self-care quotes" and read through a bunch of lists. Below are my favorites so far:
"And now that you don't have to be perfect, you can be good." - John Steinbeck
I know it is difficult to remember that perfect is the enemy of done. I definitely have a tendency to strive for perfection. Self-care is definitely reminding myself that I am only human, and I don't need to strive for perfection.
"You can't pour from an empty cup." -unknown (or at least I couldn't find with a Google search)
This quote is a good reminder that you need to take care of yourself first. If you burn yourself out you won't be able to help others.
"Talk to yourself like you would to someone you love. " Brene Brown
This is something that I really struggle with. My intrusive thoughts tend to be very abusive, and it is difficult to separate the intrusive thoughts from myself. Recognizing that I wouldn't accept that abuse from another person, or I wouldn't accept the abuse if someone was saying that to my friend can help me push back against the negativity.