Passage
Your righteousness is an everlasting righteousness, And Your law is truth.
Your righteousness is an everlasting righteousness, And Your law is truth.
Psalms 119:140 Your word is exceedingly refined, Therefore Your slave loves it.
Psalms 119:141 I am small and despised, Yet I do not forget Your precepts.
Psalms 119:142 Your righteousness is an everlasting righteousness, And Your law is truth.
Psalms 119:143 Trouble and anguish have found me, Yet Your commandments are my delight.
Psalms 119:144 Righteous are Your testimonies forever; Give me understanding that I may live.
The verse centers on "righteousness", "everlasting", and "truth". It is saying that the verse draws attention to "righteousness" and "everlasting", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 141's "I am small and despised Yet I..." into verse 143's "Trouble and anguish have found me Yet...", so "righteousness" and "everlasting" belong inside that flow. In Psalms context, the local focus is worship, trust, the LORD's kingship, and covenant mercy.
A plain takeaway is to answer the verse's own emphasis on "righteousness" and "everlasting" with trust shaped by these words, not by a vague optimism outside the passage.