This bit of wisdom comes from Jewish history via actor Mayin Bailik. When asked in an interview what piece of advice she would give to others, she said,
This is from the Talmud: “We are told to carry two pieces of paper and keep one in each of our pockets. One should read, ‘For my sake, the world was created.’ The other should read, ‘I am but dust and ashes.’” I seek in my life to live in a way that reconciles this tension. It was advice given to me by my rabbi in college.