In my holy mountain; in Zion, in my church. Wherever the gospel comes and prevails, it will have this effect. The earth; metonymically put for the inhabitants of the earth; and as before it was used for the greater part, Isaiah 11:4, so here it is used for the better part of the world. Of the knowledge of the Lord; of saying and practical knowledge; whereby he intimates that all that savageness and malignity which is in wicked men towards true Christians proceeded from their deep ignorance, and particularly from ignorance of God; and withal, that a right knowledge of God will make a marvellous and thorough change in the dispositions and conversations of men. The sea; the channel of the sea, the thing contained being put for the thing containing, by a metonymy common in Scripture and all authors.
Related Commentaries of Isaiah 11:9
Isaiah 11:9
9 They shall not hurt nor destroy in all my holy mountain: for the earth shall be full of the knowledge of the LORD, as the waters cover the sea.