Morrie says, "Forgive yourself before you die. Then forgive others" (Albom 164).
On this Tuesday, Morrie teaches Mitch about forgiveness. He tells Mitch about his old friend, Norman. When Morrie's wife had surgery, Norman didn't call. And because Morrie knew he knew about it, he never forgave him. Norman tried time and time again to apologize, but Morrie never accepted it because he was prideful. He never thought about it until hearing about Norman's death due to cancer. So he really pushes Mitch not to dwell on the past and not to get stuck on the regrets of what should've happened. In the end, Morrie tells Mitch that if he had another son, he would've liked it to be Mitch.
The sculpture is an symbol because it symbolizes forgiveness. When Morrie's wife got her surgery, Norman didn't call and that caused Morrie to put his pride above himself and never forgive Norman until it was too late.
The message readers should take away from this chapter is that you sometimes just have to swallow your pride and learn how to forgive and forget in order to live a happy and successful life.