Immutability refers to the unchangeableness of God.  God is unchangeable.  He is the one Creator of all things and weights all things by His standards. He is perfect and always remains the same. This means that there is no change in His attributes, His will, or His purpose.  Immutability is the attribute which demonstrates the reality and superiority of His infinite being. The characteristic is finite and makes Him distinctly God. He is eternal and self-sustaining.  He cannot go out of existence and will always remain as He is. Immutability also signifies that His love never changes; His grace does not change; and His will can’t change.  His entire nature is unchangeable.  This is the principle attribute of His excellence.  This attribute is essential to deity. To think of God otherwise than as unchangeable is to think of Him as imperfect.

Scriptural Context:

Exodus 3:14“And God said unto Moses, I AM THAT I AM: and he said, Thus shalt thou say unto the children of Israel, I AM hath sent me unto you.”

Ps. 102:25-27 “Of old hast thou laid the foundation of the earth: and the heavens are the work of thy hands. They shall perish, but thou shalt endure: yea, all of them shall wax old like a garment; as a vesture shalt thou change them, and they shall be changed: But thou art the same, and thy years shall have no end.”

Romans 11:29 “For the gifts and calling of God are without repentance.”

Titus 1:2 “In hope of eternal life, which God, that cannot lie, promised before the world began;”