The Book of James was written around 49 AD by James, a leader in the very first Christian church, the Church of Jerusalem.
Members of the Jerusalem church had been removed from the city and spread out to other Roman provinces because of persecution. The letter aims to encourage them during these difficult times. James explains to them that their faith will change not only their conduct but also their character. He gives his readers several tests against which they can measure their faith in Christ. If a Christian fails these tests then their faith is dead.
James 3:4-5
"Behold also the ships, which though they be so great, and are driven of fierce winds, yet are they turned about with a very small helm, whithersoever the governor listeth. Even so the tongue is a little member, and boasteth great things. Behold, how great a matter a little fire kindleth!"