该句使用条件结构表达经历与认知之间的关系。
Time flows like water and never returns. Throughout history, all great achievers have treated time as precious as gold. As the ancient saying goes, "An inch of time is worth an inch of gold, but an inch of gold cannot buy an inch of time." Yesterday and today are similar, as are today and tomorrow. Seasons cycle endlessly, while our appearance changes with the years, from youth to old age. When we realize we haven't learned what we should, mastered what we must, or done what we ought to do, the past time is lost forever. What meaning is there in such a life?
Time is like a loan that even the most reliable borrower can never repay. However, time is most generous to those who are most stingy with it. Seize today, and rely as little as possible on tomorrow. "Do not idle away your time, lest your youthful hair turns white, only to end in sorrow!"
Without falling, one cannot know the hardships of the journey; without failure, one cannot taste the bitterness of pain. A life devoid of obstacles is not a perfect one.
Peace is happiness, contentment is blessing, a pure mind is prosperity, and few desires are longevity. In affairs, one need not seek merit; avoiding error is merit enough. In dealing with others, one need not demand gratitude; avoiding resentment is virtue enough. A person's mind: excessive desire narrows it, while few desires widen it. Better to live in clean poverty and joy than in murky wealth and worry. Avoid causing distress to others, and there will be no one to resent you. When thoughts run deep, know when to retreat; when success is at its peak, know when to rest. Do not exhaust your momentum, do not exhaust your fortune, do not take all the advantages, and do not use up all your cleverness.
逝水难回，时光不再。纵观古今中外，凡是有大所建树之人，无一不视时间如金。古人云：“一寸光阴一寸金，寸金难买寸光阴。”昨天与今天并无二致，今天与明天亦无差别；四季循环往复，而我们的容颜却在岁月中悄然改变，从青葱到苍老。当意识到该学未学、该会未会、该做未做时，逝去的时光已无法追回。若如此虚度光阴，人生又何以寻得意义？
时间犹如一笔无法偿还的贷款，纵使再诚信的借贷者也终将无法还清。然而，那些对时间最为吝啬的人，时间反而对他最为慷慨。应紧握当下，尽可能少去依赖明天。“莫等闲，白了少年头，空悲切！”
若无跌倒，便难知行路的艰辛；若无失败，便难体会痛苦的滋味。一个缺乏坎坷的人生，终究是不完美的。
平安是幸，知足是福，清心是禄，寡欲是寿。处事不必求功，无过便是功；为人不必感德，无怨便是德。人之心胸，多欲则窄，寡欲则宽。宁可清贫自乐，不可浊富多忧。平生不做皱眉事，世上应无切齿人。受思深处宜先退，得意浓时便可休。势不可使尽，福不可享尽，便宜不可占尽，聪明不可用尽。
"Without humiliation, he might never have achieved greatness."
"One misfortune leads to greater maturity in understanding the world."
"There are many frustrations on the path of life."
"for there is no growth without setbacks"
"Those who have never experienced setbacks often crumble in the face of failure;"