1) since 40, I have understood many things and have no longer been confused
四十而不惑，
2) Life begins at forty.
四十不惑
3) Free from perplexities
不惑
6) One has reached the age of no doubting-forty years of age
年登不惑
补充资料：不惑
①通达，不疑惑：知者不惑｜力行而不惑。②《论语·为政》有“四十而不惑”句，后借指四十岁：不惑之年｜将近不惑之人。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
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