I will run the way of thy commandments, when thou shalt enlarge my heart.
Ver. 32. I will run the way] Do thy work with utmost diligence and delight, come off roundly and readily therein, take long strides toward heaven.
When thou shalt enlarge my heart] By thy free spirit, and by the joy of faith; when thou shalt have oiled my joints, and nimbled my feet, then shall I run and not be weary, walk and not faint, Isaiah 40:31; our promises of obedience must be conditional, since without Christ we can do nothing, John 15:5 .