Today's reading begins with "Woe to those who make unjust laws, (or don't uphold the just ones) to those who issue oppressive decrees..."   Connections to governments today?

Isaiah tells us that when God brings down His hand of discipline, a remnant will be saved.  Repeatedly God speaks about a remnant, those who stand steadfast, loyal, and obedient to Him.  Ultimately, most people have turned or will turn away from God.  Broad is the gate that leads to death and many travel it.  They aren't looking for the narrow gate. Narrow is the gate that leads to life and few will find it.  Are we as Believers the steadfast, loyal, and obedient remnant?

Isaiah 11:1-9 tells us about the shoot (Jesus) who will come up from the stump of Jesse.  Judaism

as a religion is only a stump.  Jesus is the shoot that comes from that root making the Branch (capital B) that bears fruit.  Jesus tells us that we, as Believers in Him, are the branches (lower case b) that grow to bear fruit for the kingdom.

Isaiah 11:9a
for the earth will be full of the knowledge of the LORD as the waters cover the sea.

Can our imaginations be that big? Can we even begin to wrap our minds around the earth being full of the knowledge of the Lord as the waters cover the sea?

How can we have that knowledge? He’s pretty clear in His Word.

Prov 2:1-6
My son, if you accept my words and store up my commands within you, turning your ear to wisdom and applying your heart to understanding, and if you call out for insight and cry aloud for understanding, and if you look for it as for silver and search for it as for hidden treasure, then you will understand the fear of the LORD and find the knowledge of God. For the LORD gives wisdom, and from his mouth come knowledge and understanding.

But acquiring His knowledge is proactive! We must do something! Accept Him, store up His commands, turn our ear, apply our heart, call out, cry aloud, look for it and search for it! That’s how we get His knowledge. Do you think if everyone on earth followed this passage of Scripture, the earth would be full of the knowledge of the Lord? How could it not???

"With joy you will draw water from the wells of salvation."   
Jesus is the "living water" and only through Him do we have salvation, but we must draw the water, we must seek Him.  Yesterday, we were reminded that we must "Seek him and live"   Instead of traveling that road that leads to death, we need to search for the narrow way that leads to live everlasting.