Without knowing the whole, a part cannot be created
The plans for creatures were made long ago, and every being has been created according to that plan. Every limb and organ of a creature has been thought carefully and designed to complete the body. We can understand this proof better with the following example:
For instance, if we accept that the necessary particles for life have come into being by themselves, would it answer the questions and resolve the secrets of creation for each of these works that are more wondrous than one another?
Let us suppose that a refrigerator’s parts were produced without the intervention of an engineer. Then, would a workman not be necessary to construct a refrigerator from these parts? Moreover, as these parts intended for construction appear, they must also be attached to one another in a way that constitutes a refrigerator as a whole. Every part that is to be manufactured must attach in accordance with another part, must support that part, and must not hinder the functions of other parts. If a steering wheel were attached in place of a refrigerator-door, if a radio’s speaker were to take the place of another part, then nothing would emerge.
The simplest creatures have far more complicated structures than a refrigerator. For the simplest segment to be useful, it must be constructed with consideration to the rest of the body. For example, the fly is one of the simplest creatures:
Let us assume that we have accepted that the fly’s wings, eyes, legs, and its other ligaments have formed by coincidence. However, a master would still be necessary to construct those pieces together. As the parts appear, the whole must be known and a part must be created in accordance with the whole. You cannot apply an eagle’s wing to a fly and cannot attach a chicken’s leg to it, either.
In that case, attempts to prove that matter came into existence by coincidence are not sufficient for one to denounce God. A Master is still necessary to create the whole from the parts.