The commissioning of the KJV Bible took place in 1604. King James appointed the nation’s finest language scholars and approved rules for carefully checking results. The translation was done by forty-seven scholars lasting seven years.
Immutability is a biblical doctrine which means God does not change. He is perfect in all His attributes and in His counsel (His plan throughout history; or his decreed will). God’s perfection means that He cannot become any better or any worse.
In the Sermon on the Mount in Matthew 5-7, Jesus gave his followers the norms for living in His Kingdom. Blessed are they that mourn: for they shall be comforted, is the second of the Beatitudes.