There are a great many things to say about human nature, but one feature stands out at all times: we enjoy nothing more than a mystery: if there isn't one, we'll make one. We're wide open to the latest conspiracy theory and the paradox, some contradiction in terms.
It's plainest to see on social media these days. People who insist the Moon landings were faked believe aliens land on Earth in flying saucers. They'll say it's impossible the Universe created itself from nothing, but that a Supreme Being did it is no problem. This Supreme Being is allowed to be eternal, though the Universe must be sensible. The Universe must have a Beginning and End, like everything else.
It's a mystery we manage to think all this at the same time. But then are we really here, leading a life among trees, mountains, other people and cities, or do we only imagine we are? We say we're conscious of everything and, the biggest mystery of all, of our self. What is a self? What do we mean by being 'conscious'? What is this thing, consciousness?
Well, let's consider. First, it's not a 'thing'. It's a physical process by which not only we, but anything alive, interacts with its environment, modelling and adapting to it and therefore persisting.
We must assume many forms of life do this without being self-aware; we cannot know for sure if a sunflower is figuring it out as it turns with the sun, or if a dolphin has a sense of destiny. What we know is homo sapiens is always trying to find what being self-aware is and advancing many different theories and speculations about it. Often this leads to complicating rather than clarifying matters.
One current idea, for instance, is that consciousness dissolves any distinction between the observer and what's observed, and that goes to show that our consciousness is not a separate 'thing' in us but a sharing of some ultimate pervasive metaphysical essence.
Yet that's just what a physical process would produce in an individual organism or in a group as a body. An adaptive, persisting life form on Earth, or anywhere else it may exist, will be a natural, acting occupant in and of the surrounding Universe, not some puzzle apart.