Beloved, now we are children of God, and it is not yet revealed what we will be. But we know that, when he is revealed, we will be like him; for we will see him just as he is.

 (ii) That may well be so but there is more to it. In the Greek there is a subtle difference in tenses which makes a very wide difference in meaning. In 1 John 2:1 it is John's injunction that you may not sin. In that verse sin is in the aorist tense which indicates a particular and definite act. So what John is saying is quite clearly that Christians must not commit individual acts of sin; but if they do lapse into sin, they have in Christ an advocate to plead their cause and a sacrifice to atone. On the other hand, in our present passage in both cases sin is in the present tense and indicates habitual action. 