What is the meaning of saving grace?

noun

• Christian theology. ( a state of sanctification by God; the state of one who is under such divine influence)
  • usage: "the conception of grace developed alongside the conception of sin"; "it was debated whether saving grace could be obtained outside the membership of the church"; "the Virgin lived in a state of grace"
  • synonyms: grace, state of grace
• A redeeming quality or characteristic.
  • usage: "her love of music remains her one saving grace"; "her sense of humor has to be a saving grace"; "the saving grace for both developments is that they are creating jobs"