A lot of Isaiah's messages were exclaimed through Biblical prophecy like in Isaiah 53:12 were it discuses some of the things he would have to come into trial with.
Isaiah preached from 742 to 700 B.C.
both
yes
Answer
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His core message: Matthew 4:17New International Version (NIV) 17 From that time on Jesus began to preach, "Repent, for the kingdom of heaven has come near."
Zephaniah preached his message through his writings. He would write about what God had said to him (speaking because he was a prophet).
People are capable of shaping their own destinies.
Isaiah does so, but I wouldn't call him a minor prophet. The passage isIsaiah 20.
People are capable of shaping their own destinies.
Yes. He repented while in the belly of the whale. He said that he would go to Nineveh and preach His message.
He preached that life should be enjoyed and cherished and not destroyed by school and work.