At fifteen my heart was set on learning; at thirty I stood firm; at forty I had no more doubts; at fifty I knew the will of heaven; at sixty my ear was obedient; at seventy I could follow my heart's desire without overstepping the boundaries of what was right.
吾十有五而志於學，三十而立，四十而不惑，五十而知天命，六十而耳順，七十而从心所欲，不逾矩。
Original text (Chinese)