Allah is perfect and self-sufficient, and the Quran states that He ordained mercy on Himself, which implies He was not always merciful.

Perfection is a necessary attribute of God, as it signifies completeness and self-sufficiency. In Christianity, God is described as lacking nothing and being fully self-existent, as seen in scriptures like James 1:4, which emphasizes moral perfection granted to believers by God. The assertion that Allah created mercy implies that He was not always merciful, which raises questions about His perfection and immutability. If Allah had to ordain mercy for Himself, it suggests that He lacked this attribute prior to that decision, contradicting the concept of an all-sufficient deity. Furthermore, the Quranic verses cited indicate that Allah's mercy is a choice rather than an inherent quality. This notion is further supported by Hadiths that describe Allah creating mercy and distributing it among His creation. Such statements imply a change in Allah's nature, which is inconsistent with the Christian understanding of God's unchanging perfection. In contrast, the Christian God is eternally merciful and loving, as demonstrated in passages like John 3:16, which affirms God's nature as loving and sacrificial. Ultimately, the idea that Allah's attributes can change or develop undermines the foundational belief in His perfection. A perfect God cannot be subject to change or development, as that would imply a deficiency in His nature. Therefore, the Christian perspective holds that true perfection is found in the unchanging, self-sufficient God of the Bible, who embodies mercy eternally rather than having to create it at a point in time.