Let your speech be ever graceful, seasoned with salt, so that you may know how you ought to respond to each person
Other versions
King James Version
Let your speech be alway with grace, seasoned with salt, that ye may know how ye ought to answer every man.English Standard Version
Let your speech always be gracious, seasoned with salt, so that you may know how you ought to answer each person.New International Version
Let your conversation be always full of grace, seasoned with salt, so that you may know how to answer everyone.