Derren Brown Cringes at the Past

I've often thought that if you are constantly learning and improving yourself, then you are bound to regret your past actions (i.e., things that you did before learning what you know now). Derren Brown made the point much more eloquently in an interview with the Guardian a while back, and I just came across the quote:

“I always look back on myself and cringe. . . . I feel I’ve learned so much about how to behave in the last 10 years, and I view everything before that as . . .” He tails off into a wince.