Jesus tells His disciples in Matthew 6 not to take things personally but to forgive others who sin against you. He exemplified His advice when He forgave those who crucified Him.
I once tutored a college student who took everything personally – to an extreme. Her life was a mess. When something good happened to her, she felt good. When bad things came her way, she went into a pit of her own making. Her life was all on the surface, like the rind of an orange. It was as if she were undeveloped on the inside. One day she committed suicide.