(one's) mission in life
The ultimate goal or purpose toward which one strives; one's reason or motivation to continue existing, operating, or working. Top-notch customer service is our mission in life, so if you are unsatisfied with your experience with us, we will refund 100% of your payment. Bruce's mission in life has been to serve justice to those who evade the law. A: "Why did Aunt Edna become a nun?" B: "Well, she felt that serving the poor was her mission in life."
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.