What does 'fulfill all righteousness' mean in relation to Jesus' baptism?

In Matthew 3:15, when Jesus presents Himself for baptism, He articulates His purpose: 'Thus it becometh us to fulfill all righteousness.' This phrase encapsulates the essence of Jesus’ mission; His baptism was an act of obedience that honored God's law and prepared the way for His ministry. It signifies His role as the perfect substitute who would ultimately bear the sins of His people. By being baptized, Jesus demonstrated His alignment with the will of the Father and the necessity of His future sacrificial work on the cross, affirming the righteousness that satisfies God's justice.