请问“三十而立四十而不惑，五十而知天命，六十而耳顺”用英语怎么翻译啊？

At thirty I stood firm; (三十而立)
At forty I had no more doubts; (四十而不惑)
At fifty I knew the mandate of heaven; (五十而知天命)
At sixty my ear was obedient;（六十而耳顺）

Able to establish one's career at thirty but 40 is without doubt, 50 knows God's will, but 60 is pleasing to the ear