Reply: This presupposes that it is obligatory on us to provide him help and power when he appears and not in every condition. Even if we agree to the example he mentions, his argument is not valid, because if Allah, the Exalted, has ordained us to draw out water now, it is necessary that the rope should be existent right now, because that is what eliminates excuse. However, if He says: If you approach the well, I will create a rope for you, obligation is to approach, not to draw out water. Therefore, the ability to approach is what is sufficient at that time, because one is not required to draw out water from the well, yet. It is when he approaches the well that he becomes ordained to draw out water, and then it is necessary that He creates the rope for him. An analogous instance to this would be that if it were not obligatory on us in every condition to obey the Imam and empower him, in such times, his existence would not have been necessary.