They will be helped by the prayer of their relatives, who must see to it that the sick receive at the proper time the sacraments that prepare them to meet the living God. The bodies of the dead must be treated with respect and charity, in faith and hope of the Resurrection. Autopsies can be morally permitted for legal inquests or scientific research. The free gift of organs after death is legitimate and can be meritorious. The Church permits cremation, provided that it does not demonstrate a denial of faith in the resurrection of the body.
Anger is a desire for revenge.
2094 Hatred of the neighbor is a sin when one deliberately wishes him evil. Hatred of the neighbor is a grave sin when one deliberately desires him grave harm. But I say to you, Love your enemies and pray for those who persecute you, so that you may be sons of your Father who is in heaven. Peace is not merely the absence of war, and it is not limited to maintaining a balance of powers between adversaries. Peace cannot be attained on earth without safeguarding the goods of persons, free communication among men, respect for the dignity of persons and peoples, and the assiduous practice of fraternity.