18:12-30 For a long time David was kept in continual apprehension of falling by the hand of Saul, yet he persevered in meek and respectful behaviour towards his persecutor. How uncommon is such prudence and discretion, especially under insults and provocations! Let us inquire if we imitate this part of the exemplary character before us. Are we behaving wisely in all our ways? Is there no sinful omission, no rashness of spirit, nothing wrong in our conduct? Opposition and perverseness in others, will not excuse wrong tempers in us, but should increase our care, and attention to the duties of our station. Consider Him that endured contradiction of sinners against himself, lest ye be weary and faint in your minds, Heb 12:3. If David magnified the honour of being son-in-law to king Saul, how should we magnify the honour of being sons to the King of kings!
1Sa 18:17-21. He Offers Him His Daughter for a Snare.
17. Saul said to David, Behold my elder daughter Merab, her will I give thee to wife—Though bound to this already [1Sa 17:25], he had found it convenient to forget his former promise. He now holds it out as a new offer, which would tempt David to give additional proofs of his valor. But the fickle and perfidious monarch broke his pledge at the time when the marriage was on the eve of being celebrated, and bestowed Merab on another man (see on 2Sa 21:8); an indignity as well as a wrong, which was calculated deeply to wound the feelings and provoke the resentment of David. Perhaps it was intended to do so, that advantage might be taken of his indiscretion. But David was preserved from this snare.