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to look back on (the past); to reflect on; to reminisce about
to look behind (at); to turn round (and look); to look over one's shoulder
to consider; to concern oneself about; to take notice of; to pay attention to; to take into consideration
過去を顧みることで未来が見えてくる。
By looking back on the past, the future becomes visible.
退職前に三十年の仕事を顧みた。
Before retiring, he reflected on thirty years of work.
老後になって若い頃の失敗を顧みている。
In his old age, he is looking back on the mistakes of his youth.