Wolfgang and Rajk,
Would you consider reading the book of Romans out of the King James version of the bible? Hopefully, you will learn why the law was given and what the law does for the Israelites.
If we of the world were given the 10 commandments and are not able to keep them perfectly, how could be able to keep all the law perfectly? The law of the Israelites goes beyond the 10 commandments. If you ever want to read in the old testament all the law for the Israelites, feel free.
But even the rich young ruler, who kept the law from his youth, and not perfectly of course, had to follow Christ to inherit eternal life.
King James Version
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Luke 18: 18 - 22
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And a certain ruler asked him, saying, Good Master, what shall I do to inherit eternal life?
And Jesus said unto him, Why callest thou me good? none is good, save one, that is, God.
Thou knowest the commandments, Do not commit adultery, Do not kill, Do not steal, Do not bear false witness, Honour thy father and thy mother.
And he said, All these have I kept from my youth up.
Now when Jesus heard these things, he said unto him, Yet lackest thou one thing: sell all that thou hast, and distribute unto the poor, and thou shalt have treasure in heaven: and come, follow me.
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But don't think that giving all we have to the poor will save us. In the bible, Zacchaeus did not have to give all that he had. Neither did the thief who saved while he hung on a cross.
Luke 23: 42 - 43
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And he said unto Jesus, Lord, remember me when thou comest into thy kingdom.
And Jesus said unto him, Verily I say unto thee, To day shalt thou be with me in paradise.
Luke 19: 4 - 10
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And he ran before, and climbed up into a sycomore tree to see him: for he was to pass that way.
And when Jesus came to the place, he looked up, and saw him, and said unto him, Zacchaeus, make haste, and come down; for to day I must abide at thy house.
And he made haste, and came down, and received him joyfully.
And when they saw it, they all murmured, saying, That he was gone to be guest with a man that is a sinner.
And Zacchaeus stood, and said unto the Lord; Behold, Lord, the half of my goods I give to the poor; and if I have taken any thing from any man by false accusation, I restore him fourfold.
And Jesus said unto him, This day is salvation come to this house, forsomuch as he also is a son of Abraham.
For the Son of man is come to seek and to save that which was lost.
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Lastly, there was the healed man of the Gadarenes. Christ did not ask him to follow, but publish what the Lord had done for him.
Mark 5: 18 - 20
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And when he was come into the ship, he that had been possessed with the devil prayed him that he might be with him.
Howbeit Jesus suffered him not, but saith unto him, Go home to thy friends, and tell them how great things the Lord hath done for thee, and hath had compassion on thee.
And he departed, and began to publish in Decapolis how great things Jesus had done for him: and all men did marvel.
In order to be saved, we don't need to keep the law to inherit eternal life.
John 3: 16
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For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.