The Organ of The Devil

And the tongue is a fire, a world of unrighteousness. The tongue is set among our members, staining the whole body, setting on fire the entire course of life, and set on fire by hell. (Jas 3:6 ESV)

When he says that it is set on fire by hell, it is the same as though he had said, that the outrageousness of the tongue is the flame of the infernal fire. (122) For as heathen poets imagined that the wicked are tormented by the torches of the Furies; so it is true, that Satan by the fans of temptations kindles the fire of all evils in the world: but James means, that fire, sent by Satan, is most easily caught by the tongue, so that it immediately burns; in short, that it is a material fitted for receiving or fostering and increasing the fire of hell.

(122) “A bad tongue is the organ of the devil.” — Estius.

-John Calvin, Commenting on James 3:6

The Duty of Pastors & Teachers

What are the principal duties of the pastors or teachers of the church?

(1)To be examples unto the flock in faith, love, knowledge, meekness, patience, readiness to suffer for the name and gospel of Christ, with constancy therein; (2) to watch for the souls and take care of all the spiritual concernments of the whole flock committed to them; (3) to preach the word diligently, dividing it aright; (4) to preserve and contend for the truth; (5) to administer all the ordinances of the gospel duly and orderly; (6) to stir up and exercise the gifts they have received in the discharge of their whole work and administration of all ordinances; (7) to instruct, admonish, cherish, and comfort all the members of the church, as their conditions, occasions, and necessities do require; (8) to attend with diligence, skill, and wisdom unto the discharge of that authority which in the rule of the church is committed unto them.

(1)1 Tim. iii. 1-7, iv. 12; 2 Tim. ii. 3; Col. i. 24; Phil. ii. 17, iii. 17.8.  
(2) Heb. xiii. 17; Acts xx. 28.
(3) 2 Tim. ii. 15, iv. 2; Rom. xii. 6-8.
(4) 1 Tim. vi. 20; Actsxx. 28; Jude 3.
(5) 1 Cor. iv. 1, 2; 1 Tim. iii. 15.
(6) 1 Tim. iv. 14-16.
(7) Act xx, 18-20, 25, 27; 1 Thess. iii 5; 2 Tim. ii. 24, 25.
(8) Rom,xii. 7, 8; 1 Tim. v. 17

The answer is full and plain.

-John Owen, The Works of; Volume 15, page 499