最痛的痛是原谅最伤的伤是绝望
[zuì tòng de tòng shì yuán liàng zuì shāng de shāng shì jué wàng]
It conveys a profound pain associated with forgiveness; deeper hurt is despair. It speaks about the difficulty in accepting pain done by others (forgiveness) and also about how feeling hopeless hurts immensely.