It is not "forgive and forget" as if nothing wrong had ever happened, but "forgive and go forward," building on the mistakes of the past and the energy generated by reconciliation to create a new future.
Tragedies do happen. We can discover the reason, blame others, imagine how different our lives would be had they not occurred. But none of that is important: they did occur, and so be it. From there onward we must put aside the fear that they awoke in us and begin to rebuild
If you have done the best you can do and if you have gotten all you could extract from something, you have given all you had to give, then the time has come when you can do no more than say thank you and move on.
When I look back on my past and think how much time I wasted on nothing, how much time has been lost in futilities, errors, laziness, incapacity to live; how little I appreciated it, how many times I sinned against my heart and soul-then my heart bleeds. Life is a gift, life is happiness, every minute can be an eternity of happiness.
Patience is waiting. Not passively waiting. That is laziness. But to keep going when the going is hard and slow - that is patience. The two most powerful warriors are patience and time.
You may encounter many defeats, but you must not be defeated. In fact, it may be necessary to encounter the defeats, so you can know who you are, what you can rise from, how you can still come out of it.