How do we know we are servants of righteousness?

In Romans 6:17-18, Paul writes, 'But God be thanked that ye were the servants of sin, but ye have obeyed from the heart that form of doctrine which was delivered you.' This indicates that genuine conversion leads to a heart that responds to God's truth. The transformation is not only a matter of behavior but a profound change in allegiance—where previously one yielded to sin, now one yields to righteousness. The evidence of this change is seen in the fruit of holiness produced in a believer’s life, affirming their identity as servants to God.