“Jesus answered them.
I say to you!
Everyone who commits sin
Is a slave
ἀπεκρίθη αὐτοῖς ὁ Ἰησοῦς Ἀμὴν λέγω ὑμῖν ὅτι πᾶς ὁ ποιῶν τὴν ἁμαρτίαν δοῦλός ἐστιν τῆς ἁμαρτίας.
John uniquely indicated that Jesus (ὁ Ἰησοῦς) answered these new Jewish disciples (ἀπεκρίθη αὐτοῖς) with a solemn pronouncement (Ἀμὴν λέγω ὑμῖν). Jesus said that everyone (ὅτι πᾶς) who commits a sin (ὁ ποιῶν τὴν ἁμαρτίαν) is a slave (δοῦλός ἐστιν) to sin (τῆς ἁμαρτίας). They were and had become a slave to sin, not a political slave. Jesus emphasized the power of the devil in taking people hostage as slaves by their sinning habits. Thus, a vice was a bad habit. This habitual bad sinful action was difficult to break. Thus, we are slaves to our own bad actions or sins. Do you feel like a slave to a habitual bad habit?