The freedom is freedom from sin which leads to death. When Christ makes you free, (makes as in born of God), you are set free from sin and death, no longer a slave of sin. You are become a slave of God.
This you willingly embrace because your whole nature God has changed.
God is a benevolent tyrant to His children, tyrant because God absolutely will not tolerate disobedience without you being corrected. Yes your sins are forgiven,meaning your not going to die in hell, but God scourges and disciplines everyone He receives. And all that is you God will test in fire and see what emerges at the Day of judgement.
Romans 6:22
- New King James Version
But now having been set free from sin, and having become slaves of God, you have your fruit to holiness, and the end, everlasting life.