This is what Romans 3:4 means when it says, "Let God be true, but every man a liar."
God is the measure of all things. He is not only truthful, God is the TRUTH. God is infinite and eternal. He is holy. He is just and pure and merciful and loving and kind. God is infinitely good and absolutely RIGHT.
We human beings are limited. We are subject to time. Our logic is sometimes twisted. Our passions interfere with our understanding. We are easily deceived and often self-deceived. Above all of this, we are sinful rebels - natural enemies of the true God who would, if we could, place ourselves on God's throne and pass judgment on God - rather than submitting to God's judgment of us.
When we read the Bible - we are reading God's verbal revelation of Himself. We must apply ourselves to understanding it as God intended it. But we are not free to twist it around to fit the categories and prejudices that we bring to it in our limited and sinful condition. We show our sinful nature when we say, "It cannot mean what it seems to say because that doesn't fit my idea of what must be or what ought to be or what I want it to be."
So people all over the globe systematically reject God's sovereignty, God's judgment of sinners, God's requirements of faith and obedience. People reject the idea of man's depravity and inability and God's absolute grace in salvation.
But let us VINDICATE God. Let God be true, but every man a liar. Let us be set apart as those who love God and who believe what God has revealed of Himself in the Bible - without twisting it out of shape to fit our own puny ideas.
(2 Peter 3:15–16) and consider that the longsuffering of our Lord is salvation—as also our beloved brother Paul, according to the wisdom given to him, has written to you,
16 as also in all his epistles, speaking in them of these things, in which are some things hard to understand, which untaught and unstable people twist to their own destruction, as they do also the rest of the Scriptures.