Charles H. Spurgeon on Psalms 38:2

For thine arrows stick fast in me. By this he means both bodily and spiritual griefs, but we may suppose, especially the latter, for these are most piercing and stick the fastest. God's law applied by the Spirit to the conviction of the soul of sin, wounds deeply and rankles long; it is an arrow not lightly to be brushed out by careless mirthfulness, or to be extracted by the flattering hand of self righteousness. The Lord knows how to shoot so that his bolts not only strike but stick. He can make convictions sink into the innermost spirit like arrows driven in up to the head. It seems strange that the Lord should shoot at his own beloved ones, but in truth he shoots at their sins rather than them, and those who feel his sin killing shafts in this life, shall not be slain with his hot thunderbolts in the next world. And thy hand presseth me sore. The Lord had come to close dealings with him, and pressed him down with the weight of his hand, so that he had no rest or strength left. By these two expressions we are taught that conviction of sin is a piercing and a pressing thing, sharp and sore, smarting and crushing. Those who know by experience "the terrors of the Lord, "will be best able to vouch for the accuracy of such descriptions; they are true to the life.