Charles H. Spurgeon on Psalms 119:167

My soul hath kept thy testimonies. My outward life has kept thy precepts, and my inward life my soul, has kept thy testimonies. God has borne testimony to many sacred truths, and these we hold fast as for life itself. The gracious man stores up the truth of God within his heart as a treasure exceedingly dear and precious he keeps it. His secret soul, his inmost self, becomes the guardian of these divine teachings which are his sole authority in soul matters.

And I love them exceedingly. This was why he kept them, and having kept them this was the result of the keeping. He did not merely store up revealed truth by way of duty, but because of a deep, unutterable affection for it. He felt that he could sooner die than give up any part of the revelation of God. The more we store our minds with heavenly truth, the more deeply shall we be in love with it: the more we see the exceeding riches of the Bible the more will our love exceed measure, and exceed expression.