John Gill Commentary Psalms 119:32

"I will run the way of thy commandments, When thou shalt enlarge my heart. HE." — Psalms 119:32 (ASV)

I will run the way of your commandments
Not only walk but run in it; which is expressive of great affection to the commands of God, of great readiness and cheerfulness, of great haste and swiftness in the way of them, and of great delight and pleasure therein;

when you shall enlarge my heart ;
with the knowledge of God, his word, ways, worship, and ordinances; with his love more fully made known, and with an increase of love to him; with the fear of him, and a flow of spiritual joy and peace; and when delivered from straits and difficulties, from weights and pressures, and everything that may hinder walking or running; and being in circumstances which may lead and encourage to the one as to the other; see (1 Kings 4:29) (2 Corinthians 6:11) (5:14) (Isaiah 60:5) (Psalms 4:1) (18:36) (Hebrews 12:1Hebrews 12:2) .