1Cor.15.2

By which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain.

1Cor.15.2

and by which your life has been saved. (I'm assuming, now, that your belief was the real thing and not a passing fancy, that you're in this for good and holding fast.)

1Cor.15.2

By this gospel you are saved, if you hold firmly to the word I preached to you. Otherwise, you have believed in vain.

1Cor.15.2

by which also you are saved, if you hold fast that word which I preached to you--unless you believed in vain.