One of my biggest influences in this kind of mindfulness practice is Pema Chodron in paricular a book called "when things fall apart". Even-though I am an atheist I find these kind non judgmental platforms of practice helpful. I could give many Quotes with a similar them from Pema hers is an example of one.
"You're the only one who knows when you're using things to protect yourself and keep your ego together and when you're opening and letting things fall apart, letting the world come as it is - working with it rather than struggling against it. You're the only one who knows."