Charles H. Spurgeon on Psalms 119:13

Having hid the purifying word in his heart, the Psalmist will declare it with his lips;and as it is so pure throughout, he will declare all in it, without exception. When the fountain of the heart is purified, the streams from the lips will be pure also. The declaring lips of the Psalmist are here placed in antithesis to the mouth of Jehovah, by which the judgments were originally pronounced. F. G. Marchant.