Passage
Good Thou <FI>art<Fi> , and doing good, Teach me Thy statutes.
Good Thou <FI>art<Fi> , and doing good, Teach me Thy statutes.
Psalms 119:66 The goodness of reason and knowledge teach me, For in Thy commands I have believed.
Psalms 119:67 Before I am afflicted, I--I am erring, And now Thy saying I have kept.
Psalms 119:68 Good Thou <FI>art<Fi> , and doing good, Teach me Thy statutes.
Psalms 119:69 Forged against me falsehood have the proud, I with the whole heart keep Thy precepts.
Psalms 119:70 Insensate as fat hath been their heart, I--in Thy law I have delighted.
The verse centers on "good", "thou", "doing", "teach", and "statutes". It is saying that the verse draws attention to "good" and "thou", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 67's "Before I am afflicted I--I am erring..." into verse 69's "Forged against me falsehood have the proud...", so "good" and "thou" 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 "good" and "thou" with trust shaped by these words, not by a vague optimism outside the passage.