this proverb's message is: having gone through a setback, one will have gained experience and wisdom, which will be useful if only one can take warning and learn something from the setback.
这条谚语告诉我们:一个人受到一次挫折以后,如果总结经验教训,就能增长见识和智慧。
comrades should take warning from these instances of pride and error.
同志们要从这些因为骄傲而犯错误的事例中吸取教训。
the leaders should take warning from history and renew idea of talents management.
企业领导者应以史为鑒,更新人才管理理念。
here is a message for mankind: let them take warning therefrom, and let them know that he is (no other than) one allah: let men of understanding take heed.