Everyone who sins also commits lawlessness. Sin is lawlessness.
(In these remarks the author has in view the doctrine of original sin, or imputed sin, which he thinks as absurd as sin of stature or complexion. His views will be found at large in the notes at Romans 5:0 throughout, and by comparing these with the supplementary notes on the same place, the reader will be able to form his own opinion. There does not seem to be anything affecting the point in this passage.)