One of the saddest phrases in English is probably, “If only…”
That is what Cardinal Wolsey said when he fell from the grace of King Henry the eighth:
“But if I had served God as diligently as I have done the King, he would not have given me over in my grey hairs.”
Since ‘If only…’ phrase generally implies regret for a mistake done, it is also very important that we move on after learning something from the mistake.
There are very few indeed- if at all- who can claim genuinely that they have never erred.
The saddest stories are scripted for those who cling to the nonredeemable past and refuse to look ahead.