His work is perfect.

My doctrine shall drop as the rain, my speech shall distil as the dew, as the small rain upon the tender herb, and as the showers upon the grass: 
Because I will publish the name of the Lord: ascribe ye greatness unto our God. 
He is the Rock, his work is perfect: 
Deut 32:2-4 (to 1st :)
From Concord Express - A Christian Science Study Resource: The King James Version of the Bible and Mary Baker Eddy's published writings