Bible Verses About Sincerity: Servants must render honest service

5Servants, be obedient to them that are your masters according to the flesh, with fear and trembling, in singleness of your heart, as unto Christ;

6Not with eyeservice, as menpleasers; but as the servants of Christ, doing the will of God from the heart;

7With good will doing service, as to the Lord, and not to men: