The world will learn that God judges—that He has the ultimate decision over everything. After Satan is bound, God will bring about seven reconcilements.
Keeping God's annual Sabbaths are just as much a mandate on God's people as keeping the Ten Commandments.
The fall holy days picture various judgments by God, bringing about liberty, reconciliation, regathering, and restoration.
The Feast of Trumpets is like the opening salvo of the fall feasts, beginning with a blast of the trumpet or shofar, reminiscent of the event on Mount Sinai.
If we would keep God's Feasts properly, we would be in sync with God's noble purpose for us, defending us from falling into apostasy and idolatry.
If we do not keep God's holy days, we will deprive ourselves of the knowledge of God's purpose. Jesus and the first century church observed and upheld these days.
God never says the Christian life would be easy or that life would always be fair. Difficulties and tests are given to test our hearts and promote humility.