1. He justified himself in his constant adherence to his work and to his place (v. 14, 15); and that which he was sure would not only bear him out, but bind him to it, was that he had a divine warrant and commission for it: "I was no prophet, nor prophet's son, neither born nor bred to the office, not originally designed for a prophet, as Samuel and Jeremiah, not educated in the schools of the prophets, as many others were; but I was a herdsman, a keeper of cattle, and a gatherer of sycamore-fruit." Our sycamores bear no fruit, but, it seems, theirs did, which Amos gathered either for his cattle or for himself and his family, or to sell. He was a plain country-man, bred up and employed in country work and used to country fare. He followed the flocks as well as the herds, and thence God took him, and bade him go and prophesy to his people Israel, deliver to them such messages as he should from time to time receive from the Lord. God made him a prophet, and a prophet to them, appointed him his work and appointed him his post. Therefore he ought not to be silenced, for, (1.) He could produce a divine commission for what he did. He did not run before he was sent, but pleads, as Paul, that he was called to be an apostle; and men will find it is at their peril if they contradict and oppose any that come in God's name, if they say to his seers, See not, or silence those whom he has bidden to speak; such fight against God. An affront done to an ambassador is an affront to the prince that sends him. Those that have a warrant from God ought not to fear the face of man. (2.) The mean character he wore before he received that commission strengthened his warrant, so far was it from weakening it. [1.] He had no thoughts at all of ever being a prophet, and therefore his prophesying could not be imputed to a raised expectation or a heated imagination, but purely to a divine impulse. [2.] He was not educated nor instructed in the art or mystery of prophesying, and therefore he must have his abilities for it immediately from God, which is an undeniable proof that he had his mission from him. The apostles, being originally unlearned and ignorant men, evidenced that they owed their knowledge to their having been with Jesus, Acts iv. 13. When the treasure is put into such earthen vessels, it is thereby made to appear that the excellency of the power is of God, and not of man, 2 Cor. iv. 7. [3.] He had an honest calling, by which he could comfortably maintain himself and his family; and therefore did not need to prophesy for bread, as Amaziah suggested (v. 12), did not take it up as a trade to live by, but as a trust to honour God and do good with. [4.] He had all his days been accustomed to a plain homely way of living among poor husbandmen, and never affected either gaieties or dainties, and therefore would not have thrust himself so near the king's court and chapel if the business God had called him to had not called him thither. [5.] Having been so meanly bred, he could not have the courage to speak to kings and great men, especially to speak such bold and provoking things to them, if he had not been animated by a greater spirit than his own. If God, that sent him, had not strengthened him, he could not thus have set his face as a flint, Isa. l. 7. Note, God often chooses the weak and foolish things of the world to confound the wise and mighty; and a herdman of Tekoa puts to shame a priest of Bethel, when he receives from God authority and ability to act for him.