[drstevej]

Efficacious
(n.) Possessing the quality of being effective; productive of, or powerful to produce, the effect intended; as, an efficacious law.

[CCWoody]

Cvengr's problem is that he is exactly the kind of person to whom Paul was speaking when he said this:

But indeed, O man, who are you to reply against God? Will the thing formed say to him who formed it, "Why have you made me like this?" Does not the potter have power over the clay, from the same lump to make one vessel for honor and another for dishonor?

Woody.