Psalms 119:143

These two verses are almost a repetition of the two foregoing verses, but with improvement. 1. David again professes his constant adherence to God and his duty, notwithstanding the many difficulties and discouragements he met with. He had said (Psa 119:14), I am small and despised, and yet adhere to my duty. Here he finds himself not only mean, but miserable, as far as this world could make him so: Trouble and anguish have taken hold on me - trouble without, anguish within; they surprised him, they seized him, they held him. Sorrows are often the lot of saints in this vale of tears; they are in heaviness through manifold temptations. There he had said, Yet do I not forget thy precepts; here he carries his constancy much higher: Yet thy commandments are my delights. All this trouble and anguish did not put his mouth out of taste for the comforts of the word of God, but he could still relish them and find that peace and pleasure in them which all the calamities of this present time could not deprive him of. There are delights, variety of delights, in the word of God, which the saints have often the sweetest enjoyment of when they are in trouble and anguish, Co2 1:5. 2.

— Matthew Henry's Concise Commentary (public domain)