It says that forgiveness is one of the highest and most difficult of all moral lessons. Indeed, many find the words “I forgive you” very difficult to say.Forgive and Forget—Is it Possible?
In the first sentence instead of "It says" should be "It is said". The statement is general and you are not siting anyone in specific.
Also, I suppose it is preference but I like how the sentence is already structured as "Forgive and forget - is it possible?" It has a dramatic effect to it.
SE DICE is better translated as IT IS SAID.
The last sentence "Forgive and Forget—Is it Possible?" would sound better in spoken English as "Is it possible to forgive and forget?"
Se dice que el perdón es una de las más elevadas y difíciles de todas las lecciones morales. En realidad, a muchas personas les resulta muy difícil decir: “Te perdono”. Es posible perdonar y olvidar?
Richie, we r not forced to say “I forgive you”, we can imply our regret by our manner :)