Skarpi, you can learn from, but not live in, the past. We all have things we regret doing or not doing, however life continues in whatever way it chooses,and we must make the best of it.
In spite of what some people say, I am a great believer in fate, and that I cannot change what is intended for me in the great scheme of things.
Carpe diem my friend, remember Edith Piaf 'Non je ne regrette rien'

Giok