I replied that Allah has inspired me with the answer. Just as salah cannot be performed without wudhu, similarly one cannot study Sahih Bukhari without doing the pre-final year. In the same way, taqwa is dependent on the substance of sin. Had this substance not been existent, how could one prevent it? Every prohibition requires the existence of the prohibited act. For example, I tell you not to look at the tasbTh in my hand. The existence of the tasbih is essential. If I do not have a tasbih in my hand and tell you not to look at it, everyone will say the statement is wrong. There is no tasbih in the hand.