All ministers are not called to the pastorate; and it is sometimes the duty of those who were once called to that position to leave it and enter a different department of ministerial work. In the ministry which the ascended Christ gives His church, besides pastors, there are "evangelists" and "teachers"--terms designating important classes of ministers permanently existing in the kingdom of God. A brief characterization of these, and of the functions with which they are charged, may properly be presented here. FIRST, EVANGELISTS. Of this class, Philip, Barnabas, Apollos, Timothy, and Titus are examples in Scripture--men having no permanent, local charge, but commissioned to preach and administer the ordinances of the Gospel wherever the Spirit and providence of God might call. These men were engaged, for the most part, in work analogous to that of our foreign and home missionaries--preaching the Gospel where it was not already preached, organizing churches, and supervising them in their incipiency while yet feeble and struggling. It is probable, also, that at times their work resembled that of those men called, in a narrower sense, evangelists--men engaged in assisting pastors and churches in special services for the promotion of revivals of religion. Possibly, Barnabas, when sent by the church at Jerusalem to labor in the great awakening at Antioch, may be conceived as acting in such a capacity, as also Timothy when left in Ephesus by Paul to hold in check certain heretical tendencies in that city (Acts xi. 22-24; 1 Tim. i. 3, 4). Evangelists, therefore, may be considered under the following classifications: