Charles H. Spurgeon on Psalms 119:101

I have refrained my feet from every evil way, that I might keep thy word. There is no treasuring up the holy word unless there is a casting out of all unholiness: if we keep the good word we must let go the evil. David had zealously watched his steps and put a check upon his conduct, he had refrained his feet. No one evil way could entice him, for he knew that if he went astray but in one road he had practically left the way of righteousness, therefore he avoided every false way. The bypaths were smooth and flowery, but he knew right well that they were evil, and so he turned his feet away, and held on along the strait and thorny pathway which leads to God. It is a pleasure to look back upon self conquests, "I have refrained, " and a greater delight still to know that we did this out of no mere desire to stand well with our fellows, but with the one motive of keeping the law of the Lord. Sin avoided that obedience may be perfected is the essence of this verse; or it may be that the Psalmist would teach us that there is no real reverence for the book where there is not carefulness to avoid every transgression of its precepts. How can we keep God's word if we do not keep our own works from becoming vile?