If you've never seen this in Paul's writings, Romans especially, here's how Paul describes Sin in Romans 6 and 7:
Sin as an Enslaving Tyrant:
Do not let sin exercise dominion in your mortal bodies, to make you obey their passions. (6.12)
For sin will have no dominion over you. (6.14)
You are slaves of the one whom you obey, either of sin, which leads to death, or of obedience, which leads to righteousness. (6.16)
You, having been set free from sin. (6.18)
I am of the flesh, sold into slavery under sin. (7.14)
Sin as a Conscious Agent:
Sin, seizing an opportunity. (7.8)
Sin sprang to life. (7.9)
Sin deceived me. (7.11)
