The expression "God is the judge of all" in a modern context can be understood as a reminder that true justice and moral judgment belong solely to God, not to man.

Divine Judgment and the Limits of Human Authority

The expression "God is the judge of all" in a modern context can be understood as a reminder that true justice and moral judgment belong solely to God, not to man. This belief underscores that the ultimate evaluation of human actions, intentions, and heartfelt impulses rests with His all-seeing wisdom and boundless justice. Modern religious and moral perspectives often caution us against assuming the role of judge ourselves, as human understanding is limited while God's judgment is based on complete knowledge and absolute truth.

For instance, one source reflects as follows:
"2) Many have the habit of referring an offender to God's judgment: 'Judge him, for God!'

And for what?

'He offended me.' What do you say, foolish person: 'Judge him, for God,' while Christ says: Pray for those who persecute you (Matt. 5:44). So consider, with what spirit are you invoking God's name and seeking judgment from Him against your brother? He offended you yesterday, and you are judging him today, and perhaps even earlier—as often happens among people in society; you seek judgment against him while he seeks it against you. And what would happen if God acted according to our wishes? Hardly anyone would remain alive in this world: for we sin much against one another and before God. Thus, we act foolishly when we call one another to God's judgment!"
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This quote demonstrates that invoking God's judgment for the purpose of retribution or for settling personal grievances not only contradicts the Christian understanding but also reveals our tendency to judge, when true and perfect justice can only be administered by God.

Additionally, the nature of God as judge is described in another source:
"The Judge is frightening, indescribably so. He is terrifying in His majesty, fearsome in His omnipotence, terrifying because He peers into the depths of the human spirit, and no secret thought or slightest sensation is hidden from Him. There is no place for excuses in His judgment..."
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This characterization emphasizes that God's judgment is founded on complete knowledge and uncompromising justice. Essentially, the expression "God is the judge of all" serves as a reminder that none of us has the authority to determine the measure of punishment or approval—only the One who sees the full picture of the human heart and soul knows the final verdict.

Thus, from the standpoint of modern religious and moral views, this expression is meant to humble us and indicate that any attempt to dispense moral justice on our own can lead to injustice. It inspires tolerance, an acknowledgment of our limitations, and trust that true justice will be carried out at the highest level, rather than through our limited human judgments.

Supporting quotations:
"2) Many have the habit of referring an offender to God's judgment: 'Judge him, for God!' ... So consider, with what spirit are you invoking God's name and asking for judgment from Him upon your brother?..."
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"The Judge is frightening, indescribably so. He is terrifying in His majesty, fearsome in His omnipotence, terrifying because He peers into the depths of the human spirit, and no secret thought or slightest sensation is hidden from Him. There is no place for excuses in His judgment..."
(source: link txt)