“The only way to maintain a moderate sum of happiness in this life, is not to worry about the future or regret the past too much.”

“There is only one way to happiness and that is to cease worrying about things which are beyond the power of our will.”

“It was never too late to learn something. The past is unalterable in any event. The future is the only thing we can change. Learning the lessons of the past is the only way to shape the present and the future.”

“You can't change the past, but you can ruin the present by worrying about the future.”

“Don't worry about the people in your past. There's a reason they didn't make it to your future.”

“A happy man is too satisfied with the present to dwell too much on the future.”

“As his mother said, once you started worrying about the future, you started obsessing about the past.”

“I have no regrets. I wouldn't have lived my life the way I did if I was going to worry about what people were going to say.”

“Happiness: The art of living happily is to forget the past which no longer exists, not to be worried about the future which has not come yet, and to live the present movement mindfully and wisely. All we have is here and now.”

“The only thing I regret about my past is the length of it. If I had to live my life again, I'd make the same mistakes, only sooner.”