This document is a sermon about the greatness of God as revealed in Isaiah 40:12-31. The sermon makes several points about God's immense power and wisdom as seen in His ability to measure the oceans, mark out the heavens, and weigh the entire world. It also discusses how God's understanding is beyond any human comprehension and how he has authority over all the earth, nations, stars, and rulers. The sermon concludes by emphasizing that this great God empowers the weary and gives strength to those who trust in him.