Another analogy I used recently when talking to my family goes like this. A son disobeys his father. There is a big row and the father tells the son there is no television for a week.
They are both annoyed with each other and the father is extremely disappointed with his son.
Later that night the son, realising that he was wrong and feeling miserable as his father isn’t even talking to him at dinner, goes to his father privately and says sorry telling his father that he will not be impudent and disobedient in the future. His father, delighted, gives him an big hug and even comes in to talk to him in bed about common interests and plans for the future. But he reminds the son the television stays off for a week.
Does this help? I can understand forgiveness based on love and punishment based on justice to allow for lessons to be learned and respect for the father rightly given.
Another point we often fail to realise is the terrible glory of God and our wonderful gift of son-ship. If you hit a stranger in a bar you get a specific sentence for assault. If you attack a President, you get a much heavier sentence for the assault, if you don’t get shot on the spot. Thus the higher the authority insulted the higher the punishment. Thank the Lord for His mercy when we look at our sin from this perspective.That is why the justice of God required a similar authority of God, in the form of Jesus, both man and God, to take on the forgiveness and most of the retribution required for our massive insult.