Try to forget all about "the world was created by a creator" and, in modified general metaphysical keeping, that the universe resulted from either a first cause or else somehow emerged ex nihilo (as though indefinite nothingness of itself brought about the effect of a primordial universe as thought indefinite nothingness were of itself a cause). — javra
I don't think that will help, because I can't see how saying the Universe has an overarching purpose makes any sense at all without positing a purposer. I will go further; I think saying that anything has a purpose presupposes either that it has been designed for some purpose or that it is in some sense and to some degree a self-governing agent.
In the life sciences there is talk of organs and such things as leaves, claws, teeth, stomachs, hearts and so on as having purposes, but this is really metaphor—such things have functions, they were not designed "on purpose", even if it is possible, as per epigenetics, that there can be feedback from the environment to DNA. In a sense we can look at the whole Earth as being self-organizing, but it doesn't follow that it has purposes, and even less does it follow that this self-organizing capacity constitutes an overarching purpose, a purpose from beyond the phenomenal realm, a purpose with some end in "mind".
Peirce's characterization of matter as "effete mind" I think should be read more as a metaphor in that matter is being (again anthropocentrically) considered as something that can acquire habits, and in general anything conceived as such suggests a notion of mind. All of this speaks more to our human experience-based presuppositions, and the real litmus test would be as to whether such ideas can command agreement from any unbiased rational agent, as logical, and mathematically self-evident propositions, and testable empirical observations, can.
What you need to understand about my position here is that I do not claim that all questions are capable of scientific answers. Much, even most, of what concerns us as humans cannot be
definitively (that is in any intersubjectively testable sense) answered by science or philosophy, and each of us must think philosophically as we are rationally convinced to think, a thinking which is distinct from both scientific and logical justification and purported revelation.
As Karl Jaspers says we have three modes of thinking—religious, that is dogmatic, faith, scientific knowledge and what he calls "philosophical faith" which is an existential and/ or phenomenological matter, a lifelong. open-ended pursuit of thought for each individual. We accept whatever philosophical ideas that we do accept on faith; no proof or empirical evidence of their truth is possible.
We can engage in philosophical discussion, and we may be convinced by the thoughts of others, or not, but there are no definitive answers to philosophical questions that any unbiased rational agent would be compelled to accept. Philosophy is mostly untestable speculation, yet individuals are justified, in the sense of being entitled to entertain or believe whatever they authentically feel, after making every effort to expunge tendencies towards confirmation bias or wishful thinking, is most true for them. That something feels most true for you, however, does not entail that your feeling is a justification for expecting anyone else to agree with you.