New Revised Standard Version
Anyone, then, who knows the right thing to do and fails to do it, commits sin.

Contemporary English Version
If you don't do what you know is right, you have sinned.

New American Bible
So for one who knows the right thing to do and does not do it, it is a sin.

Douay-Rheims Bible
To him therefore who knoweth to do good and doth it not, to him it is sin.

To him therefore who knoweth to do good and doth it not, to him it is sin.

Luke 12:47,48 And that servant, who knew the will of his lord and prepared not himself and did not according to his will, shall be beaten with many stripes. . . .

John 9:41 Jesus said to them: If you were blind, you should not have sin: but now you say: We see. Your sin remaineth.

John 13:17 If you know these things, you shall be blessed if you do them.

John 15:22 If I had not come and spoken to them, they would not have sin: but now they have no excuse for their sin.

Romans 1:20,21,32 For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made. His eternal power also and divinity: so that they are inexcusable. . . .

Romans 2:17-23 But if thou art called a Jew and restest in the law and makest thy boast of God, . . .

Romans 7:13 Was that then which is good made death unto me? God forbid! But sin, that it may appear sin, by that which is good, wrought death in me: that sin, by the commandment, might become sinful above measure.