Jethro though a Midianite, could not but be led to discover the hand of God in guiding Israel. The church makes the same beautiful observation at the close of a long discourse of divine mercies. Psalms 107:43.
Related Commentaries of Exodus 18:9
Exodus 18:9-11
9 And Jethro rejoiced for all the goodness which the LORD had done to Israel, whom he had delivered out of the hand of the Egyptians.
10 And Jethro said, Blessed be the LORD, who hath delivered you out of the hand of the Egyptians, and out of the hand of Pharaoh, who hath delivered the people from under the hand of the Egyptians.
11 Now I know that the LORD is greater than all gods: for in the thing wherein they dealt proudly he was above them.