I will delight myself in thy statutes - I will find my happiness in thy laws. See Psalm 1:2, note; Psalm 112:1, note.
I will not forget thy word - I will not allow the world to crowd it out of my mind.

I will delight myself - The word is very emphatical: אשתעשע eshtaasha, I will skip about and jump for joy.
14. He must exult in God's word as his treasure, live in the spirit of obedience as his work, and ever glory in God, who has called him to such a state of salvation.
15. He must never forget what God has done for him, done in him, and promised farther to do; and he must not forget the promises he had made, and the vows of the Lord that are upon him. Any young man who attends to these fifteen particulars will get his impure way cleansed; victory over his sin; and, if he abide faithful to the Lord that bought him, an eternal heaven at last among them that are sanctified.

I will delight myself in thy statutes,.... In looking over them; in meditating on them; in obeying them, and walking according to them; as every good man does delight in the law of the Lord, after the inward man, Romans 7:22; see Psalm 119:24;
I will not forget thy word: he took all proper methods to fix it in his memory; he laid it up in his mind; he meditated upon it in his heart, and he talked of it with his lips, Psalm 119:11.