Charles H. Spurgeon on Psalms 119:108

Accept, I beseech thee, the freewill offerings of my mouth, O Lord. The living praise the living God, and therefore the quickened one presents his sacrifice. He offers prayer, praise, confession, and testimony these, presented with his voice in the presence of an audience, were the tribute of his mouth unto Jehovah. He trembles lest these should be so ill uttered as to displease the Lord, and therefore he implores acceptance. He pleads that the homage of his mouth was cheerfully and spontaneously rendered; all his utterances were freewill offerings. There can be no value in extorted confessions: God's revenues are not derived from forced taxation, but from freewill donation. There can be no acceptance where there is no willingness; there is no work of free grace where there is no fruit of free will. Acceptance is a favour to be sought from the Lord with all earnestness, for without it our offerings are worse than useless. What a wonder of grace that the Lord will accept anything of such unworthy ones as we are!

And teach me thy judgments. When we render unto the Lord our best, we become all the more concerned to do better. If, indeed, the Lord shall accept us, we then desire to be further instructed, that we may be still more acceptable, After quickening we need teaching: life without light, or zeal without knowledge, would be but half a blessing. These repeated cries for teaching show the humility of the man of God, and also discover to us our own need of similar instruction. Our judgment needs educating till it knows, agrees with, and acts upon, the judgments of the Lord. Those judgments are not always so clear as to be seen at once; we need to be taught in them till we admire their wisdom and adore their goodness as soon as ever we perceive them.