God's character stays firm
The Bible is clear that God is not unstable. Through Malachi, God says that He does not change, and James describes Him as the Father of lights, without shifting shadows (Malachi 3:6; James 1:17). His holiness, mercy, wisdom, and promises do not come and go with the weather or with our moods.
That matters because prayer would be frightening if God were unpredictable. The God who hears a desperate person today is the same God who showed mercy to David, spoke with Moses, and sent Jesus in love. His steady character is the ground beneath every hard question.
Every good gift and every perfect gift is from above, and cometh down from the Father of lights, with whom is no variableness, neither shadow of turning.
God really does respond
At the same time, Scripture does not portray God as distant from human action. When Israel made the golden calf, Moses pleaded for the people, and the Lord withheld the disaster He had spoken of bringing on them (Exodus 32:10-14). Moses' prayer was not theatre. It mattered.
Nineveh gives another striking example. Jonah announced coming judgement, but the city turned from its violence. God then did not bring the calamity He had warned about (Jonah 3:4; Jonah 3:10). Their repentance did not earn God's mercy, but it was a real response to His warning.
And God saw their works, that they turned from their evil way; and God repented of the evil, that he had said that he would do unto them; and he did it not.
Warnings can call people to turn
God Himself explains this pattern through Jeremiah. If He speaks judgement against a nation and that nation turns from evil, He may withhold the judgement. If He promises good and people turn to evil, He may respond differently (Jeremiah 18:7-10). A warning is often more than a prediction. It is a merciful call to change direction.
So when God responds to repentance, He has not abandoned justice or changed His moral standards. He is acting consistently with His mercy and with the relationship He has established with people.
Not regret like ours
Some passages use language of God regretting or relenting, while others say He is not like a human who changes his mind. Both appear in the story of Saul. God speaks of being grieved that Saul became king, yet Samuel says God is not a man who can be unreliable or false (1 Samuel 15:11; 1 Samuel 15:29).
The point is not that God made a mistake and had to correct it. Saul's rebellion was real, and God's response to it was real. Unlike us, God never acts from ignorance, panic, or a broken promise. He knows the end from the beginning (Isaiah 46:10).
What this means for you
Pray honestly. Moses did. Bring your fears, requests, and questions to God rather than assuming nothing can change. Scripture treats prayer as meaningful, and it calls people to turn from sin because God is merciful (Exodus 32:11-14; Jonah 3:10).
You do not need to solve every mystery before coming to Him. Read these stories slowly and notice both truths: God is utterly dependable, and He is not indifferent. He sees, speaks, warns, listens, and shows mercy.