. . . We can tell a nest from a random pile of leaves. The nest is there because there was an intention to have it built in a particular way to serve a particular purpose. Nests don’t exist by chance. . .
If the universe were not “designed”, in other words not having been brought into existence by a rational Creator, then nests could only exist by chance.
Chance and design have to do with purpose or final causes.
A nest is the final cause of the bird’s instinctual behaviour.
Birds and nests are integral to their environment.
The final outcome is the result of numerous factors.
Sometimes the nest doesn’t work.
It remains the purpose behind the behaviour.
The universe is an expression of God’s infinite creativity, and has its goal, the discovery of its Maker.
To follow that line of thought:
Although a nest may be faulty and unable to fulfill its purposes, the existence of the behaviour reveals an underlying intent
- the creation of a soul with the capacity to move, grow, reproduce, and care for its offspring.
The creation of biological forms like the bird, which engage in complex goal-directed instinctual behaviour, requires a substrate that allows for reproduction and growth.
And, this we see in botanical life.
In order for living organisms to be, complex organic molecules must exist, arranged in specific 3D forms to exert their specific effect.
These are founded on the properties of atoms, which in turn are seen to arise as a relationship among the subatomic components which constitute that system.
These levels of existence are necessary for the existence of a person, who is a material-spiritual unity, and through whom creation communes with its Maker.
Participating with the universal material order, from which we are formed, there are all sorts of problems that may arise, and are permitted since they do not interfere with the intent of God’s plan.
The eye as part of our CNS, is an overwhelmingly awesome example of the complexity involved in the formation of living forms, whose crown is mankind.
It’s purpose is not only to connect us perceptually with the world around us but to enable us to express important features of our rational soul.
These include, not only the ability to appreciate beauty but to also engage in geometry, mathematics and science.
Although not necessary to what is essentially human, vision does allow for a fuller expression of our spiritual capacities to know, understand and move towards God.
That complexity as well as the necessary life forms which were created as part of the process by which ultimately creation meets God, makes things like eye worms inevitable.
They are tolerated because they assist in the formation of eternal beings ready to know God.