Ah, my child, you have certain faults, you know, things which prevent you from progressing. So, the negative side is to try and get rid of your defects. There are things which you have to be, to become, qualities which you must build in yourself in order to realise; so this side of construction is the positive side.
You have a defect, for example, a tendency not to speak the truth. Now this habit of falsehood, of not seeing or not speaking the truth, you fight against it by rejecting falsehood from your consciousness and endeavoring to eliminate that habit of not speaking the truth. For the thing to be done, you must build in yourself the habit of perceiving and always telling the truth. One is negative: you reject a fault. The other is positive: you build the quality. It is like that.