Duty
Perhaps you've seen duty-free shopping in airports or wished for duty-free lives. just as the Jews of the Bible could not escape paying duty, or taxes, to Rome, so we, too, cannot escape the duties or obligations of life. But we can choose to whom we'll be obligated: God or Satan, others or ourselves.

King Solomon, the wisest man who ever lived previous to Jesus, wrote that our greatest duty is to fear God and keep his commands. As  a direct act of obedience and love to God, Christians can honor the duties God has given them, including loving and respecting parents and spouses, submitting to authorities and telling others about Jesus. WHen everyone takes his or her duties seriously, the church is effective as a fully functioning witness for Christ.

Duty as a required payment to the government.
Ezra 4:13
Matthew 17:24-25
One of our duties is to fear God and keep his commandments.
Ecclesiastes 12:13
We are to accept the challenge of ministry and work toward having a heart devoted to God.
Acts 23:1
2 Timothy 4:5