The service of the Creator is different, for He has already informed us of the right course to take, commanded us to choose it, and given us the ability to do so. If then we pray to Him in respect to the choice we should make and trust in Him to show us what is good for us, we will err in our words (of supplication) and be foolish in our trust since He has already made know to us the way of his service that will benefit us in this world and the next.
Also, in secular matters, commendable means may become reprehensible, and those that are reprehensible may become commendable. This is not so, however, with service of GD or transgression of His commands. In these, that which is reprehensible or commendable remains so and never changes. pg 431