On Wednesday, Facebook COO Sheryl Sandberg took to the social media site to say that her Lean In Circle had helped her to “smile again” eight months after the unexpected death of her husband, SurveyMonkey CEO Dave Goldberg. Lean in Circles are small groups that meet to provide peer support, and in Sandberg’s case, hers is a group of women she’s known since childhood. “My connection to this group of friends was one of the things that helped pull me through,” writes Sandberg. “One day when I was feeling particularly alone and down, a card from one of them arrived in the mail. It said, ‘One day she woke up and understood we’re all in this together.’ It has hung above my desk ever since.” Sandberg believes that connecting with others can help empower people, and especially women, to believe in themselves and move forward. She encourages others to find “the Circle that supports you — and cherish the moments of joy in each day.” Sandberg also revealed the resolution she’s set for 2016. “My New Year’s resolution is to write down three joyful moments each day. To quote my favorite singer, Bono, joy is the ultimate act of defiance,” she wrote.