From Tokyo Station to Tokyo Bay
Christ Jesus Came to this World to Teach People this Truth
People do not necessarily read the Gospels from the view point that they were written based on the notion that there was the afterlife or the spirit world under control of the God like this world.
These conditions on the Gospels make it clear why Christ Jesus promoted good and encouraged people to live and behave good and love one another as well as the God.
If there was no life after death in this world or a man was destined to come to nothing after his death in this world, none would live and behave good without purchasing money, wealth, material happiness, success in this world. People should start to abuse ,attack, and exploit one another, since if they die, there would be nothing for them. While they are alive, they should try to be rich, happy, and successful by any means. As a result, this world would be a hell.
However, if men believe in the Gospels and accordingly believe in existence of the afterlife, Heaven, and the hell with the notion that only good men can be accepted in Heaven, they would naturally live and behave good.
But, if men accept only the notion that there is the afterlife or the spirit world, they may still continue to live purchasing money, wealth, happiness, worldly success, etc., since they can be happy in the afterlife. However in the Gospels, Christ Jesus declared that only good men could be accepted in Heaven, so that those with faith in Christ Jesus and the God should stop purchasing money, wealth, happiness, etc. but live and behave good and love one another.
The notion that only those with goodness and faith in the God and Christ Jesus is above the notion that there is the afterlife and the spirit world.
In other words, Christ Jesus came to this world to teach people this truth. The God had already set this rule to select those to be accepted in Heaven and those to fall into the hell. Indeed, Christ Jesus came to this world to save and prevent people from falling into the hell as much as possible.
On the other hand, Satan wants as many people as possible to fall into the hell, so that God's work to create this world and the mankind would come to nothing. For this purpose, Satan has been trying to make people deny the afterlife and purchase money, wealth, happiness, worldly success, etc. in this world.
Yet, Christ Jesus emphasized in the Gospels that happiness to be given by the God in Heaven surpasses any happiness obtained with help from Satan in this world. Therefore, we should not sell any part of our souls to Satan to be happy in this world. This is the gist and substance of the Gospels. The Gospels should be read from this point of view.
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Luke 8, King James Version
16 No man, when he hath lighted a candle, covereth it with a vessel, or putteth it under a bed; but setteth it on a candlestick, that they which enter in may see the light.
17 For nothing is secret, that shall not be made manifest; neither any thing hid, that shall not be known and come abroad.
18 Take heed therefore how ye hear: for whosoever hath, to him shall be given; and whosoever hath not, from him shall be taken even that which he seemeth to have.
19 Then came to him his mother and his brethren, and could not come at him for the press.
20 And it was told him by certain which said, Thy mother and thy brethren stand without, desiring to see thee.
21 And he answered and said unto them, My mother and my brethren are these which hear the word of God, and do it.