More of Life after Death than of Life in this World
When Christ Jesus died on the cross, His spirit departed from His body:
When Jesus therefore had received the vinegar, he said, It is finished: and he bowed his head, and gave up the ghost. (John 19)
Although His spirit would come back to His body three days later, Christ Jesus surely died at this moment on the cross as ordinary men did.
However, it is thought that the spirit of Christ Jesus just entered into the spirit world and came back to Heaven where He could enjoy eternal life. So, His death on the cross as a mere man or a son of man seems to mean nothing. Satan cannot destroy Christ Jesus, because His death in this world is meaningless for Christ Jesus. However, the fact that Satan could kill Christ Jesus at least in this world to prevent His intention and activities to save people should have a significant meaning to men.
Satan intended to show that this world was under its influence, and even the Son of the God could not intervene in its dominance in this world if the Son of the God came as a mere man or a son of man to this world. Perhaps, the God allowed men to freely exercise their liberty in choosing worldly happiness or spiritual integrity while living in this world. Consequently, men chose worldly happiness, as Eve choose apples, as abetted by Satan.
In this context, it is thought that Satan's aim is to make men corrupted in this world and thus go to the hell or get hindered from entering into Heaven.
This theory is based on the notion that life after death is more critical for souls of men than life in this world. Or, men live in this world with their souls to do a lot of good deeds so as to be allowed to enter into Heaven after their death in this world. The spirit world is more important than this world. This world is the place where men exercise their love to the God and their neighbors or do good deeds so as to be qualified for entering into Heaven.
So, it is natural that the death of Christ Jesus is depicted as "gave up the ghost" but not merely as "died." His body gave up keeping His soul in His body and the brain, and His soul should ascend to the spirit world and Heaven.
This condition should apply to everyone. After physical death of one's body, his body should give up his soul that should enter into the spirit world. And then, according to judgement, whether compulsory or voluntary, on his life before death, he should go to Heaven or the hell.
Therefore, Christ Jesus said to think more of life after death than of life in this world:
And fear not them which kill the body, but are not able to kill the soul: but rather fear him which is able to destroy both soul and body in hell. (Matthew 10)
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Luke 5, King James Version
8 When Simon Peter saw it, he fell down at Jesus' knees, saying, Depart from me; for I am a sinful man, O Lord.
9 For he was astonished, and all that were with him, at the draught of the fishes which they had taken:
10 And so was also James, and John, the sons of Zebedee, which were partners with Simon. And Jesus said unto Simon, Fear not; from henceforth thou shalt catch men.