Psalms 39:1

David here recollects, and leaves upon record, the workings of his heart under his afflictions; and it is good for us to do so, that what was thought amiss may be amended, and what was well thought of may be improved the next time. I. He remembered the covenants he had made with God to walk circumspectly, and to be very cautious both of what he did and what he said. When at any time we are tempted to sin, and are in danger of falling into it, we must call to mind the solemn vows we have made against sin, against the particular sin we are upon the brink of. God can, and will, remind us of them (Jer 2:20, Thou saidst, I will not transgress), and therefore we ought to remind ourselves of them. So David did here. 1. He remembers that he had resolved, in general, to be very cautious and circumspect in his walking (Psa 39:1): I said, I will take heed to my ways; and it was well said, and what he would never unsay and therefore must never gainsay. Note, (1.) It is the great concern of every one of us to take heed to our ways, that is, to walk circumspectly, while others walk at all adventures. (2.) We ought stedfastly to resolve that we will take heed to our ways, and frequently to renew that resolution. Fast bind, fast find. (3.

— Matthew Henry's Concise Commentary (public domain)