"Then Amaziah said to Amos, 'Get out, you seer! Go back to the land of Judah. Earn your bread there and do your prophesying there. Don't prophesy anymore at Bethel, because this is the king's sanctuary and the temple of the kingdom.'" NIV translation
Amaziah not only told the king what he wanted to hear but, now, he tries to stop Amos from speaking the truth. He accuses Amos of being a hired preacher and basically tells him to get out of Amaziah's territory. A similar type of thing happens in many churches as the pastor only shares "feel good" messages and anyone that tries to share the truth is run out of the meetings.
"Amos answered Amaziah, 'I was neither a prophet nor the son of a prophet, but I was a shepherd, and I also took care of sycamore-fig trees. But the Lord took me from tending the flock and said to me, "Go, prophesy to my people Israel."'" NIV translation
Amos' answer to Amaziah points to his humility and reminds us that it is the humble people that God uses and not the proud. He tells Amaziah that God called him from being a lowly shepherd and tending the sycamore fig trees.
This would have been a stark contrast as Amaziah was called by the king while Amos was called by the King of Kings.
"Now then, hear the word of the Lord. You say, 'Do not prophesy against Israel, and stop preaching against the descendants of Isaac.' Therefore this is what the Lord says: '"Your wife will become a prostitute in the city, and your sons and daughters will fall by the sword. Your land will be measured and divided up, and you yourself will die in a pagan country. And Israel will surely go into exile, away from their native land."'" NIV translation
Now, Amos tells Amaziah of how his family is going to be made an example to the people of Israel. His wife was going to become a prostitute which speaks of the idolatry that was going on in Israel. His children were going to be killed speaking of the death that is coming on the people due to their idolatry. Amaziah's land and possessions were going to be taken just as Israel was going to be conquered. The false prophet was going to be taken captive and die in the foreign land just as Israel was going to be removed from the land.
For us, as Christians, this shows the danger of sharing only the "feel good" message with people. This "feel good" message can deceive many into thinking that they are saved even though they do not accept Jesus Christ as their Lord and Savior. Then, on the day of judgment, they will be removed from the presence of God as Jesus says that he never knew them.