With the noun insight, the usual preposition is into. Other prepositions (including about, as to and regarding) are occasionally encountered.
- After studying this report for days, I now have some insight into this complex issue.
- Maxine has no insight regarding (as to) her son’s shortcomings. She thinks he can do no wrong.
- This experienced diplomat will provide us with fresh insight(s) about the war in the Middle East.
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