Charles H. Spurgeon on Psalms 35:9

"And my soul shall be joyful in the Lord," etc. While some ascribe to fortune, and others to their own skill, the praise of their deliverance from danger, and few, if any, yield the whole praise of it to God, David here declares that he will not forget the favour which God had bestowed upon him. My soul, says he, shall rejoice, not in a deliverance of the author of which it is ignorant, but in the salvation of God. To place the matter in a still stronger light, he assigns to his very bones the office of declaring the divine glory. As if not content that his tongue should be employed in this, he applies all the members of his body to the work of setting forth the praises of God. The style of speaking which he employs is hyperbolical, but in this way he shows unfeignedly that his love to God was so strong that he desired to spend his sinews and bones in declaring the reality and truth of his devotion. —John Calvin.