Charles H. Spurgeon on Psalms 119:139

In the last two verses David spoke concerning his God and his law; here he speaks of himself, and says,

My zeal hath consumed me, because mine enemies have forgotten thy words: this was no doubt occasioned by his having so clear a sense of the admirable character of God's word. His zeal was like a fire burning within his soul. The sight of man's forgetfulness of God acted as a fierce blast to excite the fire to a more vehement flame, and it blazed until it was ready to consume him. David could not bear that men should forget God's words. He was ready to forget himself, aye, to, consume himself, because these men forgot God. The ungodly were David s enemies: his enemies, because they hated him for his godliness; his enemies, because he abhorred them for their ungodliness. These men had gone so far in iniquity that they not only violated and neglected the commands of God, but they appeared actually to have forgotten them. This put David into a great heat; he burned with indignation. How dare they trample on sacred things! How could they utterly ignore the commands of God himself! He was astonished, and filled with holy anger.