Jesus’ sacrifice on the cross satisfied God’s justice. Because God is perfectly just, he must punish sin, otherwise he would not be true to his holy character. So instead of giving us the punishment we deserved, God sacrificed Jesus on the cross to bear the penalty of death in order to see justice done. And so God is just and the justifier of the one who has faith in Jesus! Here is a full explanation of these amazing truths:
Also on here are practical ideas on how to keep the gospel at the center of your life, every day (see more explanations and ideas by clicking the above link)!