The burden of the beasts of the south. Into a land of adversity and distress, Of young lion and of old lion, Whence <FI>are<Fi> viper and flying saraph, They carry on the shoulder of asses their wealth, And on the hump of camels their treasures, Unto a people not profitable.
Isaiah 30:4 For in Zoan were his princes, And his messengers reach Hanes.
Isaiah 30:5 All he made ashamed of a people that profit not, Neither for help, not for profit, But for shame, and also for reproach!
Isaiah 30:6 The burden of the beasts of the south. Into a land of adversity and distress, Of young lion and of old lion, Whence <FI>are<Fi> viper and flying saraph, They carry on the shoulder of asses their wealth, And on the hump of camels their treasures, Unto a people not profitable.
Isaiah 30:7 Yea, Egyptians <FI>are<Fi> vanity, and in vain do help, Therefore I have cried concerning this: `Their strength <FI>is<Fi> to sit still.'
Isaiah 30:8 No, go in, write it on a tablet with them, And on a book engrave it, And it is for a latter day, for a witness unto the age,
The verse centers on "burden", "beasts", "south", "land", "adversity", "distress", "young", and "lion". It is saying that the verse draws attention to "burden" and "beasts", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 5's "All he made ashamed of a people..." into verse 7's "Yea Egyptians FI are Fi vanity and...", so "burden" and "beasts" belong inside that flow. In Isaiah context, the local focus is the Holy One of Israel, judgment and restoration, the servant of the LORD, and Zion's hope.
A plain takeaway is to answer the verse's own emphasis on "burden" and "beasts" with trust shaped by these words, not by a vague optimism outside the passage.