Psalm 138 briefly gives the ground of faith—the Word of God. Great as His name is, what He has written, the Bible, He has magnified above all His name (verse 2). Upon that unchangeable Word, faith rests. We received and believe what He has said. In the day when we, individually, called upon Him, He answered us: He encouraged us with strength in our souls (verse 3). Presently, when His word reaches the ears of the kings of the earth, they will own Him and sing of His ways (verse 5).
He looks upon the lowly (verse 6); were it not so, how would salvation have ever been ours who trust in Jesus? And in verse 8 is the reminder that He will finish what He has begun (Philippians 1:66Being confident of this very thing, that he which hath begun a good work in you will perform it until the day of Jesus Christ: (Philippians 1:6)) .