And if it is by grace, then it is no longer by works. Otherwise, grace would no longer be grace.
KJV
And if by grace, then [is it] no more of works: otherwise grace is no more grace. But if [it be] of works, then is it no more grace: otherwise work is no more work.
ASV
But if it is by grace, it is no more of works: otherwise grace is no more grace.