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God: "I looked for someone to take a stand for me, and stand in the gap" (Ezekiel 22:30)

There is a great difference between realizing, 'On that Cross He was crucified for me,' and 'On that Cross I am crucified with Him.' The one aspect brings us deliverance from sin’s condemnation, the other from sin’s power (John Mantle).
Other Authors

The biblical writers…suggest that all persons will inevitably “mourn” for their spiritual state. They can wait to mourn until it is too late, when God has brought His judgment on the earth. Or they can mourn now, turning sorrowfully from their sin so that they will have no occasion to mourn when the Lord returns.
Douglas Moo