Buddhist wisdom from the Thai Buddhist tradition:

Do not feel hurt of resent others. Such behaviour is a waste of energy and an obstacle to success.

Do not feel disappointment in yourself or in others. Resentment or disappointment can make one capable or murder or suicide. One might destroy everything one has.

Do not be angry with oneself of others. This can only bring harm.

Do not ridicule yourself or others. Ridicule will hinder you.