Ctrl - Z in Life

Most of us know the use of this command. Well for people who don't know, this is used to undo an operation but in Unix used to suspend an operation. This is the most useful one especially to undo the mistakes we make .
How good it would be if we as human beings had such a command in our life . But then there is no beauty in this so called life .We make mistakes , we repent, we learn and then use the magical word "Sorry " aka Ctrl - Z. If someone really tells us sorry or we tell them it means the things they did were unintentional but just happened. I saw this quote put by some one in orkut "Life Teaches You Many Lessons But I don't want to learn" which is completely opposite to Ctrl -Z of Life but i thought its worth sharing .