How do we know God's justice is reliable?

God's justice is a central theme in the Bible, particularly articulated in Psalm 7 where it is shown that the believer's confidence rests in God’s unwavering justice. David repeatedly affirms that God is just and that He will execute judgment rightly. This notion is further substantiated through the redemptive work of Christ, who justifies the ungodly by His grace. Thus, believers can rest assured that God's justice is not arbitrary but is grounded in His perfect and righteous nature, where He will ultimately judge sin and vindicate His people.