The title pastor, from the Latin for shepherd, reflects the New Testament image of a church leader tending a congregation the way a shepherd tends a flock, drawing directly on passages such as Ephesians 4, which lists pastors and teachers among the gifts Christ gives the church, and John 21, in which the risen Christ commissions Peter to feed his sheep. Protestant tradition, particularly following the Reformation's emphasis on preaching the Word as the central act of Christian worship, elevated the pastor's role as preacher and teacher of scripture to a place at least equal to, and in many low-church traditions considerably more central than, the sacramental functions a priest performs in Catholic or Orthodox practice, a shift reflected in the very different physical layout of many Protestant church buildings, which place the pulpit rather than the altar at the visual center of the worship space.
A pastor's specific responsibilities, preaching, teaching, pastoral counseling, leading worship, and, in many traditions, participating in church governance alongside lay elders or a board of deacons, vary in relative weight considerably across the wide range of denominations that use the title, from Lutheran and Reformed churches with an inherited liturgical structure to independent and non-denominational congregations that give the pastor's own preaching gifts and personal leadership considerably more latitude to shape the congregation's worship and direction.