'By Grace' in the Bible

But if by grace, then it is no more of works; otherwise grace is no more grace. But if it is of works, then it is no more of grace; otherwise work is no more work.

For if I by grace am a partaker, why am I evil spoken of for that for which I give thanks?

(even when we were dead in sins) has made us alive together with Christ (by grace you are saved),

For by grace you are saved through faith, and that not of yourselves, it is the gift of God,