Albert Barnes Commentary Psalms 119:157

"Many are my persecutors and mine adversaries; [Yet] have I not swerved from thy testimonies." — Psalms 119:157 (ASV)

Many are my persecutors and mine enemies — The thought here turns on the number of his enemies, and on the effect which numbers might have in turning one from the way of truth. We might meet one such enemy, and overcome him; we might resist the influence of one in endeavoring to turn us away from the truth, but the danger of falling is much increased when numbers are combined in persecuting us, or in seeking to turn us away from our religion — when it becomes unpopular to be a professed friend of God.

Yet do I not decline from thy testimonies — I still adhere to you; I still maintain my integrity, notwithstanding all this. See the notes at (Psalms 119:51).