Self is 'NoThing' and at the same time self is something!
According to Wikipedia this complementary example in an image with two faces and a vase (sometimes known as the Rubin face or the figure–ground vase) is a famous set of ambiguous two dimensional forms developed around 1915 by the Danish psychologist Edgar Rubin.
A complete description of the image requires that it’s two, but in fact you can’t see both simultaneously, but you can move between them very quickly. Since your perspective allows you only to see one or the other, you've to look back and forth as a result you have to exclude the other possibilities at the moment of observation.
In the same token, at a physical level self exists as a body and mind and interacts as an object separate from everyone and everything around.
But when you look self at a microscopic level the body disappears and all left is a community of cells that are connected with everything around. And if you go further down to a nanoscale level the cells don’t exist independently. They are assemblies of biomolecules floating in water.
It’s kind of looking at a flock of birds flying in the sky, you think it as one solid object, but in reality you know it’s birds.
But that doesn’t mean self doesn’t exist. It exists in certain circumstances depending where you put your attention
So neither our perception of the physical body or science is true to the exclusion of the other or no one understanding is giving you the whole picture; because the moment you conceptually latched to the physical definition you will lose the scientific definition.
Therefore, it’s safe to say that there’s no right or wrong selection, but appropriate selection according to a given time and situation.
You might wonder, if there's any other use for the knowledge of the dual existence of self besides mental stimulation.
It’s been a while science has been saying that under the right circumstances, a
placebo can be just as effective as traditional treatments.
The idea that your brain can convince your body a fake treatment as the real to stimulate healing is encouraging to access the non-physical state of self, which’s commonly known as energy body.