The mistake is that we cling to the body when it is the spirit that is really immortal.
Swami Vivekananda"The Kingdom of Heaven is within you." Where goest thou to seek for the Kingdom of God, asks Jesus of Nazareth, when it is there, within you? Cleanse the spirit, and it is there. It is already yours. How can you get what is not yours? It is yours by right. You are the heirs of immortality, sons of the Eternal Father.
Swami Vivekananda