Not sure what you think this text means: it is a present tense in the Greek, so it comes out something like this: the one who has been born out of God does not keep on (practice) sinning, for the seed of God keeps on remaining in him, and he cannot keep on practicing sin, because he has been born out of God.
But I do not think John means that it is OK and normal and right for the Christian to just commit a few sins as long as you do not make a practice of sinning. That would go against the whole spirit of the book of I John. I think that what he is trying to say is that sin in incompatible and incongruent with who a Christian (with a new nature) is a child of God.
So if you asked John: Do you sin? or will you sin in the next week? -- I think he would answer something like this: "I am not planning to sin . . ."
But I do not think John means that it is OK and normal and right for the Christian to just commit a few sins as long as you do not make a practice of sinning. That would go against the whole spirit of the book of I John. I think that what he is trying to say is that sin in incompatible and incongruent with who a Christian (with a new nature) is a child of God.
So if you asked John: Do you sin? or will you sin in the next week? -- I think he would answer something like this: "I am not planning to sin . . ."