God does not and will not change within Himself.
He is unchanging in His being, perfections, purposes, and promises.
“For I the Lord do not change” (Mal 3:6).
We are continually becoming. Only He Is pure Being with no becoming.
God’s unchanging nature (immutability) is our security.
“My soul waits in silence for God only;
From Him is my salvation.
He only is my Rock and my Salvation,
My stronghold; I shall not be greatly shaken” (Ps 62:1-2).
“Ascribe greatness to our God!
The Rock! His work is perfect,
For all His ways are just;
A God of faithfulness and without injustice;
Good and upright is He” (Deut 32:3-4).
“. . . the Father of Lights, with Whom there is no variation or shadow due to change” (Jms 1:17).
“The counsel of the Lord stands firm forever,
The thoughts of His heart to all generations” (Ps 33:11).
“Has He said, and will He not do it?
Or has he spoken, and will He not fulfil it? (1 Sam 15:29).
Our faith, hope, and knowing depend on God not changing.
Because He is absolutely and eternally unchanging, He is infinitely worthy of trust.
“It fortifies my soul to know,
That, though I perish, Truth is so;
That, howsoe’er I stray and range,
Whate’er I do, Thou dost not change.
I steadier step when I recall
That, if I slip, Thou dost not fall.” (Arthur Hugh Clough)
God’s “immediate” acts — His interaction with His creation and His creatures — are expressions of and means toward the realization of His eternal unchanging will. His immutability is consistent with His constant activity and perfect freedom.
“He is in one mind, and who can turn Him? . . .
For He performs that which is appointed for me;
And many such things are with Him” (Job 23:13-14).
“I Yahweh, change not;
Therefore you, O sons of Jacob, are not consumed” (Mal 3:6).
(Spotlight 7, Lesson 2 in Doctrine 101: Learning about God)