How do we know Jesus Christ fulfills the law?

Jesus Christ did not come to abolish the law but to fulfill it, as supported by passages like Matthew 5:17. His baptism, in which He participated to fulfill all righteousness, illustrates His commitment to fulfilling the prophetic and ritual aspects of the law on behalf of His people. By fulfilling every prophecy and dot of the law, He ensures that there can be no accusation against those for whom He bears the penalty of sin—demonstrating His dual role as both just and justifier for those who believe in Him.