In Christianity, missional living is the adoption of the posture, thinking, behaviors, and practices of a missionary in order to engage others with the gospel message. The missional church movement, a church renewal movement predicated on the necessity of missional living by Christians, gained popularity at the end of the twentieth century due to advocates like Tim Keller and others in the Gospel and Our Culture Network. Advocates contrast missional living with the concept of a select group of "professional" missionaries, emphasizing that all Christians should be involved in the Great Commission of Jesus Christ.