It is no use speaking with hindsight or feeling regret.
We Buddhist practitioners must come to terms with reality and discover our own flaws and shortcomings by reflecting on those of others;
Understand the workings of karma, and emulate Bodhisattvas who fear causes, but not sentient beings who fear consequences.
千金難買早知道,
萬金難買後悔藥,
學佛人要接受現實,
從別人身上看到自己的缺點和不足,
知因懂果,要學菩薩畏因,不學眾生畏果。
– Master Jun Hong Lu, Words of Wisdom Volume 3