The three regions here named are the inward thought, the outward
practice, and the testimony of the lips. Note that that testimony is a
consequence of thought and practice.
1. The purpose of the deliverance is to make 'prophets of His law.'
Such was the divine intention as to Israel. Such is God's purpose as to
all Christians. The very meaning of redemption is there. He has 'opened
our lips' that we 'should show forth His praise.' He has regard to 'His
own name.' He desires to make us vocal, for the same purpose for which
a man strings a harp, to bring sweet music out of it. Words of
testimony are a form of love.