Consider the end of God's decrees

Consider the end of God's decrees - and this is no other than His own glory. Every rational agent acts for an end; and God being the most perfect agent, and His glory the highest end, there can be no doubt but all His decrees are directed to that end. "For to Him are all things" (Rom. 11.36).

~ Thomas Boston 
Source: Of the Decrees of God, Commentary on the Shorter Catechism.