How do we know that spiritual freedom through Christ is true?

In Colossians 1:13, it is stated that God has "delivered us from the power of darkness and translated us into the kingdom of His dear Son." This transformation is evidence of spiritual freedom. The very act of believing in Christ and His redemptive work demonstrates the freedom we have been given. When Christ opens our eyes to our need for Him, we can finally accept His sacrifice and live free from the burden of sin and the law, as the law has been fulfilled in Christ. Thus, a believer's faith is the proof of their freedom.