He knew that Tiglath-Pileser III, the successor of Assur-dan, had crushed all rebellions in Assyria, which Assur-dan III had failed to do, and was reorganizing the army of the great empire. He knew that Damascus, which had been weakened by Jeroboam II beyond hope of recovery, would be the first point of conquest for the young and energetic Pul, as Tiglath-Pileser was called. Next before him, to the south, lay the rich Kingdom of Israel, the booty from whose palaces and sanctuaries would be an enormous prize for the Assyrian emperor and his army. After Damascus, must come Samaria!
In other words, Amos saw distinctly that the time was near when Israel would have to fight again for its independence and its very life; and he asked himself, "Is Israel prepared?"
Clearly it was not. The rich had become unfit for war, because of their luxuriant living. The poor had become unfit for war, because of their oppression by the rich. Should the Assyrians invade the land, how could such a nation of weaklings defend its home and its liberty?
Israel must be warned! It must be awakened from its stupidity to a realization of the danger ahead! The rich must cease their extravagances and become manly men again! The poor must be given their rights, must be treated justly and righteously, that they may become manly men again! Only a nation of moral, upright, God-fearing men can hope for victory! If the Assyrians should defeat and crush Israel, it will be God's punishment visited upon Israel for its sins and crimes.
Amos had often discussed these things with his mother. She was not surprised, therefore, when, one day, upon his return from a long trip into Assyria, Amos said to her, "I am called to the cities of Israel. My mission will be prolonged many days."
The good woman knew and understood. Laying her hands upon his head, she repeated the blessing with which she had blessed him when, as a timid young man, he made his first trip to Jerusalem:
"Go, my son, and God be with thee."
And so it was that Amos, the herdsmen of Tekoah, had dared to speak for the poor people in Samaria, and to prophesy the fall of the Kingdom.
His first speech attracted little attention, but others, in various parts of the country, to the same effect, followed. Many laughed at them; few thought seriously about them.
But Amos was not so easily discouraged. He concluded that the wrong idea the people had about God, how to worship Him and what He demanded of them, was the cause of all the evil. Amos, therefore, selected the sanctuaries during festival season as the place where he must do his preaching.