Never regret anything that once made you smile and never give up on something you can't go a day without thinking about.
~ Psalm 511:2.7
I think its pretty much self explanatory!
I have made many mistakes in my life that haven't made my life any easier, but I've never regretted those things most people consider mistakes, because they've made me smile. That's like saying "I regret falling in love" or "I regret being happy."