Guilt is anger directed at ourselves--at what we did or did not do. — Peter McWilliams. American author and activist (1949–2000) Guilt
Mistakes, obviously, show us what needs improving. Without mistakes, how would we know what we had to work on?
In reality, serendipity accounts for one percent of the blessings we receive in life, work and love. The other 99 percent is due to our efforts.