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Tico master.
"Shall a trumpet be blown in the city, and the people not be afraid? shall there be evil in a city, and the LORD hath not done it?
Surely the Lord GOD will do nothing, but he revealeth his secret unto his servants the prophets.
The lion hath roared, who will not fear? the Lord GOD hath spoken, who can but prophesy?" Amos 3:6-8
Would not the context be warning to his prophets, so that they would warn the Israelites, so they would "clean up their acts", before it was too late, i.e., judgment?
"a trumpet"=warning
"Surely the Lord GOD will do nothing", i.e, withholding judgment
until
"he revealeth his secret unto his servants the prophets"=let the prophets know what was coming
Law/justice and grace principle working:The LORD God, due to His holiness/righteousness, will judge evil, but, in love, He gives a "heads up", a forewarning, to those He is about to judge, through the prophets, to whom He has revealed this(secret) . That is, there is a just cause that He should judge evil, but His love intervenes with a warning.
verse 8:"The lion hath roared, who will not fear? the Lord GOD hath spoken, who can but prophesy?"=Just as lion's roar causes trembling, fear, so does the LORD God's voice through the prophets warning to the people. And when the LORD God speaks, the prophets cannot be silent(even though men may demand the prophets to "shut up"-7:10-17).