Marcus Aurelius reminding us that external events or people cannot corrupt our inner self — only our own choices and thoughts can.
It is in your own power to maintain the beauty of your soul, or to be a decent human being.
If once you realize this, you will never lose it again.
Marcus Aurelius, Meditations, Book 5, section 16
Mindfulbalance 
This i know on a cogitative level – but the “felt” level is definitely a slow learner and at times i fall into the corrupted inner self!
Thanks for the reminder