Passage
See, this alone I have found, that God made man upright, and they--they have sought out many devices.
See, this alone I have found, that God made man upright, and they--they have sought out many devices.
Ecclesiastes 7:27 See, this I have found, said the Preacher, one to one, to find out the reason
Ecclesiastes 7:28 (that still my soul had sought, and I had not found), One man, a teacher, I have found, and a woman among all these I have not found.
Ecclesiastes 7:29 See, this alone I have found, that God made man upright, and they--they have sought out many devices.
The verse centers on "alone", "found", "upright", "they--they", "sought", and "devices". It is saying that the verse draws attention to "alone" and "found", so its meaning should be read from those terms before moving to application.
The prior verse says "that still my soul had sought and...", giving immediate footing for "alone" and "found". In Ecclesiastes context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "alone" and "found" with trust shaped by these words, not by a vague optimism outside the passage.